Question

When your classmates at school or cooperatively on project it is an example of a positive influence by

Answer 1

Hello There!

When your classmates at school *work cooperatively on a project, it is an example of positive influence by a peer group.

Hope This Helps You!
Good Luck :) 

- Hannah ❤ 

Answer 2

I found the exercise on the internet and these are options:
"Your heredity
Your culture
A peer group
A psychologist"

It's an example of a positive influence by a peer group.
A peer group is a group of people that may share similar background, interests, social status or even age. As these are important social groups in the persons' lives, the members of these groups are likely to influence each other beliefs and behaviour.