Answer:
Sour lemon gummy candy.
Step-by-step explanation:
Classical conditioning is the form of learning when the neutral stimulus with the unconditioned stimulus results in the strong biological response. Pavlov explains the classical conditioning.
The unconditioned stimulus is the stimulus that has the ability to naturally triggers a particular response. On seeing gummy candies, the salivation begins in mouth and acts as the unconditioned stimulus. This response is not learned and present automatically.
Thus, the answer is sour lemon gummy candy.