Answer:
B) classical conditioning.
Step-by-step explanation:
In psychology, "Classical conditioning" is one of the famous learning theories that was proposed by a psychologist named Ivan Pavlov while researching with the dogs.
In classical conditioning, "conditioned stimulus" generally produces a behavioral response i.e, the conditioned response while becoming connected with a naturally occurring or unlearned stimulus i.e, the unconditioned stimulus.
As per the question, option B is the correct option.