Alan always turns the aquarium light on before putting fish food into the tank. after a while he notices that the fish swim to the top to look for the food as soon as he turns on the light. in this example, is the unconditioned stimulus.

In this example, the fish food is the unconditioned stimulus.

Explanation:

This is an example of Classical Conditioning, in which various types of stimulus are used to trigger certain responses.

The given example of classical conditioning has unconditional stimulus as fish food.

The response with respect to the stimulus has been given by the conditioning. When the response has been based neutral stimulus with the previous act, has been classical conditioning.

In the given situation the light has been the conditional stimulus that has been able to trigger the fishes the arrival of the food. However, the fish food that has been the real stimulus has been the unconditioned stimulus.

For more information about the unconditioned stimulus, refer to the link:

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