no no no.
This works:
in header.php look for:
<span>
<a>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a>
</span>
Replace with:
<span>
<div id="logo"> <a>"><img src="https://www.your_URL.com/images/eco.jpg" alt="Your text" /></a></div>
</span>