High CPU usage

I got the following message from Hostgator yesterday. I don’t understand any of the logs or technical detail given that – I think – whould show me where to look for the problem – how can I tell from this if it because of a plugin or something else. If anybody could give me some tips I would be really grateful. I have two blogs and they are both now disabled completely. I am waiting for Hostgator to give me temporray access to my admin page so I can fix it and want to be ready to know what I should try and change. My websites only get about 100 visitors a day each. Here is the message I received:

This message is to advise you of a temporary resource limitation on your account. Your account has exceeded our extreme usage threshold for several hours. You can view your CPU usage by logging into cPanel. It is located in the left side bar under statistics. We do not actively disable accounts until they greatly exceed our Terms of Service CPU limitation (25%).

Performance of your site may become degraded by this resource limiting, additionally if the extreme usage persists and continues to affect server stability your account may be disabled entirely.

Once the extreme CPU usage has stopped on your account, the restriction will be removed within 3 hours. Alternatively, if you have fixed the CPU usage, you may unrestrict your account up to five times by logging into your cPanel account:

*** NOTICE: You may only unrestrict your account 5 times before a permanent ban will be issued! ***

We recommend taking steps to reduce the overall CPU usage for the account, which may be as simple as the following:
* Generating a flat HTML page for popular content.
* Enabling caching that is available through many popular scripts.
* Disabling high CPU usage features such as searches or Ajax refreshes.

Logs of the CPU usage are provided below:

CPU seconds used in the past hour: 2885.60000000001, 81% CPU

Thu Nov 21 15:01:08 CST 2013
Running Processes:
kazzie   15181 50.0  0.1 328940 45276 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15182 54.0  0.1 333084 49416 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15219  0.0  0.0 301876 17128 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15247  0.0  0.0 201600 10232 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php

Running Queries:
*************************** 1. row ***************************
   USER: kazzie_kazzie
     DB: kazzie_southdata
  STATE:
   TIME: 0
COMMAND: Sleep
   INFO: NULL
*************************** 2. row ***************************
   USER: kazzie_kazzie
     DB: kazzie_southdata
  STATE:
   TIME: 0
COMMAND: Sleep
   INFO: NULL

Open connections

Current Site Requests:
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /
76.164.208.163  thesouthafricaguide.com /wp-comments-post.php
76.164.208.163  thesouthafricaguide.com /wp-comments-post.php
76.164.208.163  thesouthafricaguide.com /wp-comments-post.php
76.164.208.163  thesouthafricaguide.com /wp-comments-post.php
76.164.208.163  thesouthafricaguide.com /wp-comments-post.php
76.164.208.163  thesouthafricaguide.com /wp-comments-post.php
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a
76.164.208.163  thesouthafricaguide.com /wp-content/cache/qc-c-68a87fb1508773a9dc151775dd27b130-68a

 Doc Root: /home4/kazzie/public_html

CPU Usage: 127% (warning)

Snapshot 1
kazzie   15181 34.5  0.1 346104 62588 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15182 36.5  0.1 348196 64556 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15219 42.0  0.1 321512 37860 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15247 38.0  0.1 318100 34144 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php

Snapshot 2
kazzie   15181 36.0  0.1 347668 64200 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15182 38.0  0.2 350284 66912 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15219 45.0  0.1 323560 40008 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15247 40.0  0.1 319936 36008 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php

Snapshot 3
kazzie   15181 37.0  0.1 348988 65548 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15182 39.5  0.2 352368 68732 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15219 48.0  0.1 325356 41872 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15247 42.0  0.1 321252 37556 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php

Snapshot 4
kazzie   15181 38.5  0.2 351056 67688 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15182 41.0  0.2 353900 70488 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15219 51.0  0.1 327916 44312 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15247 45.0  0.1 323308 39540 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php

Snapshot 5
kazzie   15181 39.5  0.2 352880 69408 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15182 41.5  0.2 354156 70748 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15219 53.0  0.1 329728 46252 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php
kazzie   15247 48.0  0.1 325868 42264 ?        RN   15:01   0:00 /usr/bin/php /home4/kazzie/public_html/index.php

Current load:  15:01:09 up 148 days,  3:14,  0 users,  load average: 0.06, 0.01, 0.00