Answer:
B). This excerpt is part of the falling action. It expresses the theme that nature is a powerful force.
Step-by-step explanation:
The Falling action is described as the element of a literary plot that takes place right after the climax when the central conflict of the story gets resolved and heads the narrative towards the conclusion.
As per the question, the given excerpt from Part 2 of 'To Build A Fire' is an element of falling action as it foreshadows the man's death which is the resolution of the central problem i.e. ungrateful and ignorant nature of man towards nature. The other thing about this excerpt is that it discusses the central idea of 'expression of nature's power.' The man was unable to consider the benign face of nature full of warmth and security and as a result, 'this time the shivering came more quickly upon the man.' Thus, option B is the correct answer.