Answer:
Regression
Step-by-step explanation:
Regression is a psychological defense mechanism in which a person adopts certain behaviors from an earlier stage of development. The person leaves behind her age-appropriate coping strategies and shows earlier behavior patterns and typically childish attitudes (eg thumb sucking). Under the action of intense stress, adaptation mechanisms are lost and primitive adaptation patterns are retaken. Regression is a way of bringing back a time when the person felt safe and cared for.