Answer:
Sour lemon gummy candy.
Step-by-step explanation:
The classical conditioning learning may be defined as a type of learning that are associated with the stimulus. The learning provides the reward or punishment.
In classical conditioning, the strong stimulus combined with the neutral stimulus and increases the response against the stimulus. Jade salivates whenever he sees the sour lemon gummy candies. Here, the sour lemon gummy candies acts as the unconditioned stimulus.
Thus, the answer is sour lemon gummy candies.