How does the writer use language to illustrate how harsh the environment is in lines 10 to 20?

The author uses descriptive language to describe the frigid cold and its effects of the dogs.

It was the masterful and incommunicable wisdom of eternity laughing at the futility of life and the effort of life. It was the Wild, the savage, frozen-hearted Northland Wild.

But there was life, abroad in the land and defiant. Down the frozen waterway toiled a string of wolfish dogs. Their bristly fur was rimed with frost. Their breath froze in the air as it left their mouths, spouting forth in spumes of vapour that settled upon the hair of their bodies and formed into crystals of frost. Leather harness was on the dogs, and leather traces attached them to a sled which dragged along behind.

This answer is based upon lines ten through twenty in my text.