Step-by-step explanation:
Young girls and boys are extremely vulnerable and easily influenced. They are often influenced by their siblings and peers around them. The word peer pressure comes to mind in when thinking about teenager. Young people, especially teenagers tend to look and behave the way they see people around them, of their age do.
For example, if the best friend of a teenager has purchased branded clothes, they would also want their parents to buy them the clothes as it would make them feel different than others. Similarly, teenager always compare themselves to their siblings and often look up to them.
But, such influence is not always a bad thing as sometimes teenagers learn positive values around their peers or siblings too.