During adolescent stage, the losing of sense of invincibility and learning that decisions have consequences are example of social change. Young people start to develop stronger set of values and morals. They are most likely influence by friends, especially when it comes to behavior, sense of self, self-esteem, and working out who they are and where they fit in the society.
Moreover, they have many questions and the tendency is that they want to explore on their own and practice independence. Social changes also means sense of responsibility with their actions. This behavior is likely to have impact in the decisions they make and the relationships with their family and friends.