Final answer:
Mike's behavior of moving back with his parents and playing video games after not getting a job exemplifies the defense mechanism of regression, where a person returns to earlier, less mature behaviors to cope with stress.
Step-by-step explanation:
After Mike does not get the job he interviewed for, he moves back in with his parents and spends his days playing video games. This behavior exemplifies the defense mechanism known as regression. Regression is an ego defense mechanism in which a person faced with anxiety retreats to a more immature behavioral stage, displaying behaviors characteristic of an earlier stage of development rather than dealing with the situation in a more mature way.
This mechanism is often triggered by stressful events or situations, leading an individual to revert to old, less sophisticated mechanisms for coping with stress and feelings of inadequacy.