Answer:
The dog's instinct tell that it is too cold and therefore it is better not to travel but to stay by the fire.
Explanation:
'To Build a Fire' is one of the most heartbreaking short story authored by Jack London. The tale illustrates how a man fails to reach a camp and eventually freezes to death. The man's dog instincts tells that it it too cold to travel anywhere and thus it is better that the man stay where there is fire. But the man ignored the dog's instinct and decided to continue his journey in the freezing cold weather. But only the dog knew that his feeling was true than the man's judgment.
