Answer:
The man fails to understand the importance of the sun, as it symbolizes life and a source of warmth. The fact that he had not a hint of fear was worrisome.
Having imagination would have helped the man think and predict the consequences of his actions.
His spittle freezes in the air, he loses sensation in his fingers, steps in a pool of water, gets his feet wet, and drops a match in the snow, after toppling snow on his meager fire by pulling on tree branches.
The man shows a disregard for his dog's safety by pushing him to walk over thin ice and by attempting to kill him so he could crawl into its carcass and survive the night.
A civilized man has become goal-oriented, egocentric, and uncaring and as such has put his ability to survive in peril.