Here is a minimalist example of a descendant selector:
<style type="text/css"><!--
div.warning p{color:red;} /* descendant selector */
--></style></head><body>
<div class="warning">
<p>Warning! Meltdown is imminent.</p>
</div>The descendant selector in the preceding code (div.warning p) targets the paragraph element that is contained within the <div> element.