Answer:
4 explain the main ideas in something you read, heard, or watches
Answer: between the last one and first one but my best guess is A
Explanation: Hope this helps!
A. is the most sensible answer tbh, the librarian is inside a library she/he wouldn't really pay attention to kids. Books on gender roles may be in there a bit but not completely since it won't really talk about what you're trying to search for. Articles on phycology definitely isn't going to helped learn about children on the playground.
