Who says the following and why?
"this hot weather is making you soft . . be a realist. the world is made up of two classes—the hunters and the huntees. "

Sanger Rainsford is scoffing at Whitney's sympathy for the hunted animals.

Explanation:

In "The Most Dangerous Game" by Richard Connell, the protagonist Sanger Rainsford and his friend Whitney are on their way to the Amazon River basin. They are big game hunters and were on their way for a hunting trip.

Whitney and Rainsford were talking about the upcoming hunting when Whitney refutes Rainsford's claim of hunting as the best sport. Whitney said that for the hunter, it may be fun but not for the hunted, sympathizing for the hunted animals. He said, ""Even so, I rather think they understand one thing--fear. The fear of  pain and the fear of death."  This made Rainsford to proclaim that Whitney had turned soft, "The world is made up of two classes—the hunters and the huntees", and luckily for them, they are hunters which is a better situation for them.

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