Answer: Chameleon Effect
Step-by-step explanation:
Tanya Chartrand and John Bargh in a study in 1999, found evidence of a social phenomenon known as The Chameleon Effect where people non-consciously mimic behaviors and mannerisms of people in their social environments.
They found that as people interacted with their social partners more, they began to passively and unconsciously mimic such behaviors as their posture, facial expressions and even mannerisms in other to fit in more into that environment. For example, a person talking to another person who has their arms folded might find themselves folding their arms as well without even meaning to do so.