In this contemporary world, who is the biggest impact on the youngest is the biggest debatable talk all around the world. I think both, teacher and friends, have major role in the talk of impact. I will discuss situation in the following paragraphs.
To sum up, there are many reasons that show that friends are having more impact on the young people. The first and foremost one is, the are helping them or guiding them better compare to parents and teachers. In some condition people are hesitating to explain their problem with their parents or teachers. At that time they ask help to their friends. And also their friends help them to come over from that problem in smart and easy way. For example, according to human organization, 85% of younger people are very comfortable to talk or asking help or advise to their friends rather than asking to their parents for professor. Because of the bonding and free mindset nature as well as they can help them if they need.
On the other side, I think parents and teachers are have big hand to impact younger people. Parents are teaching their child ,how do overcome with their problem in easy way because of their own past experiences. Teacher and parents have more knowledge compare to their friends. And also they face lots of problem in their life and overcome with smart way. For example, in one survey of news paper of world, they identify that the person who is asking help to their teacher or parents are easily came out from their problem compare to asking their frineds.
In conclusion, I think both have same impact on the young generation. Because parents and teachers are helping them by advising easy and true way to overcome from problem. On the other hand friends are their to help them in that condition when the young person are not able to share their parents.