HTML IMG SRC
<img href="https://website.com/image.jpg">
<!-- for an image online -->
<img src=C:\your_files>
<!-- for a local file -->
Delightful Dove
<img href="https://website.com/image.jpg">
<!-- for an image online -->
<img src=C:\your_files>
<!-- for a local file -->
<img src="image.jps">
//image.jpg is where you would put the inage source.
<img src="smiley.gif" alt="Smiley face" height="42" width="42">
<img src="<?php echo get_template_directory_uri(); ?>/images/filename.png">
<img src="something.png"><!-- YOU CAN DO DROP A LINK AS WELL --!>