Answer:
The answer is explained below.
Step-by-step explanation:
To Build a Fire is a short story written by American writer Jack London. There are two versions of this story, one from 1902 and the second one from 1908; the last one is considered a classic and it is usually collected in books. The story is about a nameless main character that tries to travel through the taiga in the winter.
The inclusion of the lines mentioned in the questions help define the conflict (man vs nature) and that's why they are important in the story.