Final answer:
By the story's end, it is evident that the man lacks an adequate appreciation of his insignificance compared to the vast and powerful forces of nature.
Step-by-step explanation:
By the story's end, readers are certain that A. The man lacks appreciation for how tiny and weak he is compared to nature. This is shown through various instances in the texts where the characters face the immense power of nature, which serves to illustrate the overarching theme of man versus nature. For example, the man's panic when faced with the possibility of freezing to death, and his false sense of security about traveling alone in the cold wilderness, highlight his underestimation of the natural world's power. The other options provided, such as the biscuits in the man’s pocket and his presence of mind, are not substantiated by the text as being of certain relevance or descriptive of the man's attitude by the story’s end.