Answer:
Motivated forgetting
Step-by-step explanation:
It is a psychological behaviour in which a person forgets unwanted memories either unconsciously or consciously.
It is a defence mechanism as there are conscious and unconscious coping techniques involved to reduced anxiety that arise due to unacceptable impulses.
Motivated forgetting have two types psychological repression and thought suppression. In thought suppression a person tries to exclude memories and thoughts form his awareness, while psychological repression is done unconsciously.