Is a term used to describe when an individual cannot consciously recall a trauma that occurred in his/her life because it is too painful to remember.

Repression is the emotional struggle to direct one's wishes and thoughts approaching pleasurable impulses by eliminating them from one's cognizance and handling or overcoming them in the psyche. According to the psychoanalytic approach, repression performs a significant position in many psychic illnesses and the character of the average person.

Repression is a fundamental concept of psychotherapy, where it is recognized as a security mechanism that assures that what is unacceptable to the deliberate intention and also suspended stimulate concern, which is restricted from penetrating to the mind.

i think it is the third one.