Concept:Repression is an unconscious defense mechanism that pushes painful or threatening memories out of conscious awareness.
Explanation:The question asks about the unconscious process of forgetting.
Repression automatically removes anxiety-arousing thoughts and painful memories from the conscious mind.
This process happens without the person's awareness, so the memory seems forgotten.
It is considered the basic defense mechanism in psychoanalytic theory.
The repressed memory is not truly lost; it can later affect behaviour or return to consciousness under certain circumstances.
Option C, Repression, correctly matches this unconscious process of forgetting.
Answer:C. Repression