Final answer:
The concept from Freud's psychoanalytic theory that posits all thoughts, feelings, and actions have an underlying psychological cause is called psychological determinism. The correct option is a) Determinism
Step-by-step explanation:
An important part of Freud's psychoanalytic theory is the notion that all thoughts, feelings, and actions have an underlying psychological cause, a concept called psychological determinism.
This idea aligns with Freud's belief that the unconscious mind significantly influences our conscious thoughts and behaviors.
According to Freud's theory, repressed memories and suppressed thoughts within our unconscious, which includes elements like the id, ego, and superego, drive our actions and play a pivotal role in psychological issues such as anxiety and neuroses.
His work utilized various methods such as dream analysis, free association, and the 'talking cure' to access these unconscious elements.
Despite the decline in the popularity of some aspects of his theory, Freud's contributions have set the stage for much ongoing psychological thought and research. The correct option is a) Determinism