Main elements in html

HTML-CSS
1

The main element should have two paragraph elements as children.
I will like to know how to do that.will some one show me ?am new here

2

this <div> has a child element:

<div id = "parent">
     <h2 id = "child">I am an h2!</h2>
</div>

Sometimes, tags may also have “grandchildren”

<div id = "parent">
     <span id = "child">
          <h3 id = "grandchild">I am an h3!</h3>
     </span>
</div>

Do you see the pattern here?
An <h1> is nested inside of a <main> tag. which is the child?

Solution 
<main>
     <p>[text]</p>

     <p>[text as well]</p>

</main>