Concept:Insight learning is a sudden flash of understanding that solves a problem without trial and error. It was proposed by Wolfgang Kohler.Explanation:Kohler, a German psychologist, demonstrated this with chimpanzees in a room. Food was placed out of reach, but boxes and sticks were available. The chimpanzees did not try random actions. Instead, they suddenly realized they could stack boxes and use a stick to bring the food closer. This "aha" moment shows insight — a sudden reorganization of experience. Insight does not rely on repeated attempts or observation. It is an intuitive leap. Kohler’s experiment proves that learning can happen all at once, not just step by step. In contrast, Skinner gave Operant Conditioning, Hull proposed Drive-Reduction Theory, and Rogers offered Experiential Learning Theory.Answer:C. Kohler