pseudo-classes question

Question

Good daytime!
Understood in quiz but don't find how to use it in my code.

How can I make first block in green text?
Where in code i need post this?

#parent p:first-child {
color: green;
}

https://code.sololearn.com/WSKMnwEbZm38/#html

Answer 1

You can insert it as internal or external CSS declaration (in head <style> tag or in own css file)... Anyway i dont find in your code some element with parent id then it has not effect