Respuesta :
The environment of a story is the physical location where the subjects are, this is revealed on the excerpt: "On the left fork of Henderson Creek, where the boys were already, they had come over across the divide from the Indian Creek country". This section tells us the geographical location where the story takes place. We also know the temperature is below fifty degrees in this story.
Answer: I would contend that the right answer is actually "at fifty below."
Explanation: Just to elaborate a little on the answer, it can be added that on this excerpt from Jack London's short story the character is on his way to Henderson Creek, but the narrator is not describing this area yet. The only direct and precise reference to the physical environmental conditions of the story at this point is the one about the temperature. This suggests that the character is in an extremely cold landscape.