Concept:Social learning theory, proposed by Albert Bandura, holds that learning occurs through observing and imitating others' behaviors.Explanation:Bandura's theory states that imitation is central to learning. Learners watch how others act in various situations and then copy those actions. This is called observational learning or modeling. A child, for instance, imitates a peer who is rewarded for a certain behavior. This shows that imitation forms the basis of social learning theory. Cognitive learning (Piaget) focuses on internal mental processes, while operant conditioning (Skinner) relies on rewards and punishments. Neither emphasizes imitation as the primary mechanism.Answer:D. Social learning