Answer:
Option 4)
Conditioned response
Explanation:
1) Unconditioned Response:
In classical conditioning, this response can be defined as a response which occurs naturally and is unlearned. It triggers unconditionally in response to an unconditioned stimulus.
2) Conditioned Stimulus:
This stimulus is that kind of stimulus that was previously meaningless before its association with an unconditioned stimulus. After being associated with an unconditioned stimulus, a conditioned response is triggered.
3) Unconditioned Stimulus:
It can be defined as a natural or unconditioned stimulus that triggers a response naturally or automatically.
4) Conditioned Response:
This response results from a stimulus that was previously neutral. It is a learned response.