Answer: Classical conditioning involves associating an involuntary response and a stimulus, while operant conditioning is about associating a voluntary behavior and a consequence. In respondent conditioning, the US could be an appetitive or aversive stimulus. For instance, in appetitive conditioning, the US would be something desirable such as candy which makes us happy. Other examples could include water, food, sex, or drugs. For example, when lab rats press a lever when a green light is on, they receive a food pellet as a reward. When they press the lever when a red light is on, they receive a mild electric shock. As a result, they learn to press the lever when the green light is on and avoid the red light.
Step-by-step explanation: