Answer:
d. the unconscious
Step-by-step explanation:
Freud was fascinated by the human unconscious, and this faction made him formulate the theory of the unconscious that represented a milestone in the history of psychology. This strange and fascinating underworld that generates uncontrollable fantasies, lapses, and impulses has finally allowed us to see most mental disorders not as somatic diseases, not as brain diseases, but as punctual changes in our mind.
Freud did not discover the unconscious, we know he was not the first person to talk about it. However, he was the first person to make this concept a constitutive system of the human being. He has devoted his whole life to this idea, to the point of asserting that most of our psychic processes are in themselves unconscious and that conscious processes are nothing more than isolated acts or fractions of all this subterranean substrate beneath. visible part of the iceberg.
However, between 1920 and 1923 Freud took a step further and further reformulated his theory of the mind to introduce what is now known as the structural model of psychic instances, including the classic entities of “ego, id and superego”. "