Sue noticed that whenever she opened the door to the pantry, her dog would come into the kitchen and act hungry, by drooling and whining. she thought that because the dog food was stored in the pantry, the sound of the door had become a(n) unconditioned stimulus. conditioned stimulus. unconditioned response. conditioned response.

The answer is conditioned stimulus. Whenever Sue gave food to her dog that is in the pantry, she also opens the door there to get the food. So the dog had learned an association between the sound of door and the food and a new behavior had been learned. Because this reaction was cultured (or conditioned), it is known as a conditioned response.