Answer:
Reference Group.
Step-by-step explanation:
A reference group is any group whose patterns, actions and characteristics directly or indirectly influence the life and actions of an individual. We all participate in groups, can be family, work, friends, school and others. In this matter, after his first day at work, Jeff was influenced by his new work reference group, which made him replace his clothes with more formal clothes, so that he was properly inserted in the new pattern of actions and behaviors. of the group.