No this is not a compound sentence
It depends on Static Electricity.
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.
Most people call her a level-headed student. That would be the correct answer, because level-headed is always hyphenated.