Answer: alternative D.
Explanation: The animals that go through this process understand that everytime they drink the unusual-tasting liquid they will be injected, being that a very unpleasant series of events. They are conditioned, therefore, to be afraid of the unpleasantness of this process by associating pain to the actions that are part of it.
I’m pretty sure that your answer would be A
The answer is D because everyone benefits from physical activity.
It is the tropesphere. Hope i helped :)
It goes 2 , 5, 3, 4 , 1 in order from top to bottom