Answer:
extinction
Step-by-step explanation:
In classical conditioning extinction occurs when the appearance of a conditioned response diminishes or disappears. In the context of classical conditioning, this happens when a conditioned stimulus is no longer paired with an unconditioned stimulus. An example of this can be seen in the question above, where the smell of baking cookies encouraged Ken to crave the cookie to the point of drooling, but when he began to taste bad-tasting cookies, that stimulus disappeared.