Answer:
D. The description of Crusoe's illness develops the idea of people
struggling against forces greater than themselves.
Step-by-step explanation:
One of them major themes of Daniel Defoe's (1660–1731) novel "Robinson Crusoe" (1719) is nature. To Robinson, nature can be both kind and merciless. It is nature that leaves Robinson alone on the island. And it too was nature that provided him with goats, seed/crops for his food, and parrots for his companies. On the island, Robinson learns that many aspects of nature can be a bounty if properly used, but can be destructive if one is not careful in handling it. His getting sick shows that aspect of nature which can be destructive.
Option A is not correct because the passage is mainly about Robinson's illness.
Option B and C are not correct because they are not the overall meanings or themes of the novel.