Answer:
A lot of things
Step-by-step explanation:
Teenagers go through a lot like depression, heartbreak, and fake friends. It's different for guys and girls: Guys lose friends, get new friends, get heartbroken, break girls hearts, then when they glow up they act like they been built like that. Girls start having periods, start growing things on their body, start getting moody, starts to focus on their looks, start having to shave/wax, and same as the boys: the break hearts and get their heart broken. We are all the same but were different.
Nae