Later in freud's life, and affected him deeply and thus became major themes in his theory as well as in his in own life.

The correct answers are death and aggression. Freud considered agression as compelling a part of human nature as sex. Two primary types of instincts according to Freud are life and death. Instincts are  the exclusive source of energy for human behavior. Till this day Freud's ideas have not been completely scientifically validated.

answer; critical thinking;