Which behavior illustrates "regression" in adults?

Regression is a psychological defense mechanism where an individual reverts to behaviors characteristic of an earlier stage of development when faced with stress or anxiety. This behavior serves as a way to cope with difficult emotions or situations that may be overwhelming.

Throwing a temper tantrum in adults exemplifies regression, as it is a behavior typically associated with younger children who are learning to manage their emotions. In adults, such behavior indicates a temporary retreat to a less mature way of handling frustration, conflict, or disappointment, demonstrating an inability or unwillingness to cope with challenges in a mature manner.

This response represents a departure from adult behaviors such as logical problem-solving, seeking support, or taking responsibility, all of which reflect more developed coping mechanisms and emotional regulation typical of adulthood.