Mark is angry when the teacher blames him for misbehaving when it actually was the child behind him who had been acting up. As he leaves after school, he shoves another boy who gets in his way. Freud would say
That Mark is unconsciously using the defense mechanism of:

Question

Quizplus · Accepted Answer

Displacement is a defense mechanism in which a person redirects their negative feelings or impulses towards a safe target instead of the real target. In this case, Mark is displacing his anger towards the teacher onto the other child by shoving him. This behavior is not a conscious decision, but rather an unconscious attempt to release his frustration.

Mark Is Angry When the Teacher Blames Him for Misbehaving