What is the term that Martin Seligman would use to describe Marc's feelings that nothing he does matters?

Question

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Martin Seligman is known for his research on learned helplessness, which refers to a sense of hopelessness and despair that arises when individuals believe they have no control over the outcome of a situation. Marc's feelings that nothing he does matters align with the concept of learned helplessness.

What Is the Term That Martin Seligman Would Use to Describe