Final answer:
Marcel's experience with the croissants and the jingling of the cash register is an example of classical conditioning, where a neutral stimulus becomes associated with an unconditioned stimulus, leading to a conditioned response.
Step-by-step explanation:
Marcel's learning is an example of classical conditioning. This form of learning happens when we start to associate a previously neutral stimulus (the jingling of a cash register) with an unconditioned stimulus (the taste of a croissant) that elicits an unconditioned response (mouth watering). After several pairings, the neutral stimulus alone is enough to bring about a conditioned response (mouth watering). This is similar to Pavlov's experiments, where a bell sound (neutral stimulus) becomes associated with food (unconditioned stimulus) and causes dogs to salivate (conditioned response). The jingling sound becomes the conditioned stimulus and Marcel's mouth watering becomes the conditioned response, even without eating the croissant.