In our opinion, we think the effect that influences the most in a teenager's development are friends because most of teenagers like to make friends with other people, like to do the activities together, and also when we are at school we stay with our friends all the day, we will exchange the idea with each other so we will get a lot of things whether it is about the study, social, funny things, and our development. The most important role for us is family and friends because if we don't have our family to support us it is going to be very hard to do everything alone, but when you grow up you will met many other type of friends.If you met a good friend your friend will have a big impact on you. And of course if your friends are a good person you will be one too.