When referring to a child element, it simply refers to being nested, or placed inside of the element it is referencing.
Example:
<html>
<body>
<main>
<p>Some text here</p>
<p>Some more text here</p>
</main>
</body>
</html>
So because the <p> elements are inside of the <main> elements opening tag (<main>) and closing tag </main> the <p> elements become child elements of the <main>. Making the <main> element the parent to both <p> elements. Because both <p> elements belong to the parent element of <main>, it would make them sibling elements.
If you would like more clarification feel free to ask!
Had the exact same problem, and after hours of tinkering found that the problem simply is that you need to start the main tag and the top of the first paragraph under you <h2>heading, and end the tag at the bottom of your second paragraph
hey Venitha995,
i just wanted say thank you. I was stuck at this level for hourrrrrs Omg. I got several suggestions on how to go about it but none was able to explain it (too apt and direct) like you did, so thank you again!!!