Which details from Part 1 of "To Build a Fire” provide information about the physical environment of the setting? Select three options.

As he turned to go, he spat speculatively.
He knew that at fifty below spittle crackled on the snow, but this spittle had crackled in the air.
As for lunch, he pressed his hand against the protruding bundle under his jacket.
He plunged in among the big spruce trees.
A foot of snow had fallen since the last sled had passed over, and he was glad he was without a sled . . .