Answer:
Rainsford is an excellent hunter.
"I've seen you pick off a moose moving ... at four hundred yards."
Whitney has been to Rio before.
"It will be light in Rio," promised Whitney
This is the first time Rainsford has made this journey.
"What island is it?" Rainsford asked.
Rainsford does not sympathize with the animals he kills.
"Who cares how a jaguar feels?"
Explanation:
The dialogues are from an adventure novel named "The Most Dangerous Game" (1924) written by Richard Connell.
Rainsford is novel's protagonist and Whitney is his friend. They go to Ship-Trap Island which most hunters and sailors dread and avoid because of it being very dangerous.