A teenager is old enough to take care of him/herself.

If the teenager was 15-16-17 then he or she would not be able to take care of themselves. If the teenager was 18-19 then him/herself might be able to take care of themselves. The reason I say 15-16-17 year olds will not be able to take care of themselves is because they would half to buy there own food, buy their own furniture, and pay their own rent or buy their own house. The reason I say 18-19 year olds can take care of themselves is because when my brother was 19 he moved out and bought a condo, started working and after a few years of working he has enough money to support him.