<img src="img.jpg" alt="Description when image is not found" width="100" height="100"><img src="img.jpg"
alt="Description when image is not found, for accessability, or for SEO"
><img src="<?php echo get_template_directory_uri(); ?>/images/filename.png"><html>
<head>
</head>
<body>
<img src="example.end">
</img>
</body>
</html>