Answer:
His attitudes towards animals and what it feels like to be the hunted.
Step-by-step explanation:
In this story, Rainsford is an avid hunter. He travels to different regions of the world in order to hunt increasingly exotic animals. However, when he is left in an island and he meets General Zaroff, he becomes the "prey," as Zaroff enjoys hunting humans. This experience transforms Rainsford, and at the climax of the story, he has an epiphany about his attitudes towards animals and what it feels like to be hunted.