Answer:
A) The Caribbean Sea
Step-by-step explanation:
Initially, Rainsford is at risk when he falls off the yacht and drops into the sea. Sharks inhabit the waters of the Caribbean Sea. These are numerous species. However, this is a component of the setting that Rainsford does not have to contend (deal) with.
Flashing lights attract ships into a channel full of enormous boulders with fine points. Since Rainsford unexpectedly got to the island through another path, he does not have to contend with this.