Question

What is the primary purpose of the detailed descriptions Barry Holstun Lopez includes in the excerpt from Of Wolves and Men?

to inform the reader about what the forest is like from the wolf’s perspective
to persuade the reader that people should work to conserve unspoiled land in Canada
to express the author’s personal feelings about the beauty of the Arctic forests
to entertain the reader with a fast-paced description of how a wolf hunts a caribou