Explain why it can be harmful but also beneficial when a teenagers brain isn't fully developed.

when a teens brain isnt fully developed its more susceptable to being shaped or, molded, by outside influences. This could either be a good or bad thing as it could allow them to learn how to form their own opinions and feelings. But, it could also be vulnerable to damaging influences that could hurt them in the future.

Explanation:

d is the answer hope this

well say a good goal is to do 150 sit ups in a week! or 90 pull ups a day. even 60 push ups in a month these are all fair goals!