Why do you think some teenagers do good things and others (in the same family often) do bad things?

Hi [이름] ^^

Thank you for having time in answering this question. :)

You\'re on point! So, it is indeed very important for us to know who we get friends with. 

As they say, \"Tell me who your friends are and I will tell you who you are.\"

Have a great one! ^^   

I think the problem lies with their friends.

>> Correct
 Because teenagers are affected a lot by their friends.

>> Correct

or

>> Because teenagers get more influenced by their friends.  
 If you meet a good friend, you will follow the friend and do good things.

>> If you meet a good friend, you will follow that friend and do good things. 

or

>> When you meet a good friend,  you tent to follow that friend and do the same.
 On the contrary, if you meet a bad friend, you will follow the friend and do bad things.

>> On the contrary, if you meet a bad friend, you will follow that friend and do bad things.