Which sentence from “the most dangerous game” suggests person vs. environment conflict?

the man’s only answer was to raise with his thumb the hammer of his revolver.

“nonsense, laughed rainsford. “this hot weather is making you soft, whitney.”

“you’ll find this game worth playing,” the general said enthusiastically.

“what perils that tangle of trees and underbrush might hold for him did not concern rainsford just then.”