Answer:UCS Rootbear schnapp
UCR sickness
CS Rootbear candy
CR nauseated
Explanation: the unconditioned stimulus (UCS) is a natural stimulus, it ignite a bodily or emotional response. It flows naturally and does not require one to acquire it by learning. The ignition or trigger is usually USR (Conditional response). Unconditioned stimulus becomes condition stimulus if and when a neutral stimulus disrupt UCS process or was present before or during the process of UCS. But in the process of UCS, when the ignition or trigger mechanism is by CS rather than UCR, then CR(conditioned response) is the response that is formed.