The <figure> tag was introduced in HTML 5. The <figure> tag did not exist in older versions of HTML. which tag is used to diagrams, photos, code listings,code,images etc.In the figure tag should be relevant to the main content.
<img src="..." />
<p>The sunflower got its name from its huge fiery blooms, whose shape and image is often used to depict the sun </p>
<img src="../../images/flower-icon.jpg" border="0"/>