Miguel is having a stressful day at work. He notices in the mirror he is frowning. He changes his expression to a smile. His mood perks up. What hypothesis explains this change in emotion?

When Miguel has a stressful day at work he is obviously under much stress and has not been able smile. So just looking at the mirror and smiling reminds him of how good it feels to smile. then makes him feel good

Explanation:

I put the explanation in the answer

answergenetic engineering;