Simon’s rabbit gets a treat every night. the treats come in a bag that makes a crinkling sound. when the rabbit hears the crinkling sound of the bag, he runs to the door of his cage to await the treat. one night when simon was eating a bag of potato chips, the rabbit hears the crinkling sound of the potato chip bag and runs to his cage door. the crinkling sound is the:

Conditioned Stimulus

Explanation:

Conditioned stimulus is a piece of the learning  Classical Conditioning theory.

In this theory, a conditioned stimulus is defined as an impartial stimulus that after some time and training, inspires a reaction by over and again being connected with another naturally happening stimulus.

There is a possibility for a conditioned stimulus to condition the other stimulus.

Thus here in the case of rabbit, if the rabbit hears the crinkling noise just before Simon fed him, this would be the original conditioned stimulus.

If Simon takes the crinkling bag near the cage before using it, the rabbit will eventually associate Simon going to the cage with being fed.