Answer:
The anwer is conditioned stimulus.
Explanation:
In classical conditioning, any neutral stimulus can become conditioned when associated with an unrelated consequence (called unconditioned stimulus).
Pavlov's experiment used the sound of a bell to cause a conditioned response, this is, the salivation of the dog. However, his theories demonstrate that the sound of a bell could have been replaced for any other stimulus, such as a whistling or clapping sound. These would have become conditioned if constantly followed by the food.
