Question

Why are adolescents called teenagers

Answer 1

because adolescents are of age 13 , 14 , 15 , 16 , 17 , 18 , 19
As you can notice , when we write number names , it ends with ' teen '.
This is the reason.

Answer 2

adolescence is called teenagers because in this stage a child only focus on his future he never listen anyone he want do the work which he want to do.........