Question

what did sigmund freud consider as the key to understanding the nervous disorders he observed?
free will
the unconscious mind
brain physiology
external consequences

Explanation:

Sigmund Freud was a pioneer in psychoanalysis. He believed that the unconscious mind, with its repressed thoughts, desires, and memories, was crucial in understanding nervous disorders. His theories centered around the idea that many psychological issues stem from unconscious conflicts.

Answer:

the unconscious mind