I don't understand what it means a child element nested inside

HTML-CSS
1

Tell us what’s happening:
what does it mean, “a child element nested inside?”
inside where? what does it mean by child…

Your code so far


<h2>CatPhotoApp</h2>
<p>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy furr catnip scratched.</p>
<p></p>
<p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36.

Challenge: Introduction to HTML5 Elements

Link to the challenge:

2

If you re-read the explanation, you’ll see that there is an example of nested elements.