Riddhima is suffering from lack of attention, reverted to a form of infantile behaviour. This type of adjustment mechanism used in -

Adjustment mechanism refers to the psychological processes or strategies individuals use either consciously or unconsciously to cope with stress, emotional conflict, or internal or external demands.

• These mechanisms help maintain mental balance and emotional well-being, especially when a person faces challenges or threats to their self-esteem or functioning.

Key Points

• Regression is a defense mechanism where an individual reverts to behaviors from an earlier stage of development when faced with stress or anxiety.
• In this case, Riddhima is suffering from a lack of attention and has reverted to a form of infantile behavior, which indicates she is using regression as a coping strategy.

Hint

• Repression refers to the unconscious blocking of unacceptable thoughts or feelings, not reverting to earlier behaviors.
• Aggression involves hostile or violent behavior, which is not relevant to the situation described.
• Depression is a mental health condition characterized by persistent feelings of sadness, but it doesn't explain the specific behavior of reverting to infantile behaviors.

Hence, the correct answer is Regression.