Answer: He is motivated by financial success.
Step-by-step explanation:
In George Orwell's Animal Farm, the animals rebel against their human farmer.
Mr. Whymper is a human solicitor hired by Napoleon as an Animal Farm representative. He initiates the interaction between Animal Farm and the society, and is the first human the pigs interact with after the Rebellion.
Whymper is described as "a sly-looking man with side whiskers, a solicitor [lawyer] in a very small way of business, but sharp enough to have realized earlier than anyone else that Animal Farm would need a broker and that the commissions would be worth having" (6.9). This means that Whymper understands that he can earn a lot of money from this job, which is why he acts as an intermediary in the first place.