If you're asking for main idea, the main idea or thesis statement sentence is sentence 1, where they explain what the passage is about.
Answer:
I can't see the statements so I can't give a definite answer. However, think of it this way: We know the statement needs to add to the idea that insects are dangerous. So you need to chose the option that presents insects in a negative light or gives a specific reason to fear them. A neutral or positive fact about insects would not support the idea.
D. "his sister, who had taken a sales job, learned shorthand and French in the evenings so that she might be able to get a better position later on"
The detail that best reveals that Mr. Rainsford opposes Zaroff's idea of the ideal prey is Mr. Rainsford's response near the end of the passage when he states that he is a hunter, not a murderer. This statement shows the reader that Mr. Rainsford believes that Zaroff hunting humans as prey makes him a murderer.
The word part anthro means human