Aggressive behavior in young adults from 12-18 age

Hi
My topic about aggressive behavior in young adults from 12-18 age and the point is guns.
You will write about impact guns in behavior for young adult after that u can write about the causes like points because I will make presentation in this paper for example:
1Environment around a young adult: explain
2Depression: write about it
3-problems or system at home: write about it
4availability of guns: write about it
5Statistics

ATTETIOIN 1-Please write SIMPLE words and vocabulary because i am international student.
2GET straight to point. NO introduction and NO conclusion
Thank you