Pleasure Principle:This is the driving force guiding the id, which seeks immediate gratification of all needs, wants, and urges.
Unconscious Mind:A reservoir of feelings, thoughts, urges, memories that are outside our conscious awareness but influence our behavior significantly according to Freud’s theory.
Libido: In Freudian psychology this term refers to sexual desire or drive for survival; it's energy created by survival or sexual instincts.