Answer:
The roses are the conditioned stimulus.
Explanation:
In the classical condition theory by Ivan Pavlov, a conditioned simulus (the rose in this example) is associated with an unconditioned simulus (the shock), and provokes a conditioned response (fear).
A famous experiment involves Pavlov ringing a bell every time he was going to feed a dog. In time, the dog started salivating just by hearing the sound of the bell.
