Question: what is the difference between the man and the dog in to build a fire?
Answer: In, To Build a Fire, the man is shown to be woefully inept at survival and in the end, is deemed by nature to be unworthy. The dog, a creature of nature, is used by the author as a 'foil' of sorts. He is better able to take care of himself in such situations. The dog doesn't feel the cold, but the man does.