Answer:
Nesting in HTML allows you to improve readability and find and fix problems more easily; option D.
Step-by-step explanation:
Nesting in HTML is placing (or "nesting") elements within other elements. For example:
<div id = "about>
<h1 id = "h1"> About </h1>
<p> Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Adipiscing bibendum est ultricies integer quis. Quam elementum pulvinar etiam non quam lacus. </p>
</div>
The <h1> and <p> tags are "nested" within the main <div> tag. Nesting allows the developer to identify and fix bugs or change the code easily
You can learn more about programming from W3Schools, MDN Web Docs, or any other web development tool.