Explanation

The Sargasso Sea (B) is a unique region in the Atlantic Ocean, bounded by ocean currents (not a coastline), making it the only sea without a land border. It is often described as a “sea within a sea.” The Aegean Sea (A) and Red Sea (C) both have coastlines. “None of these” (D) is incorrect because the Sargasso Sea is the correct answer. Correct Answer: B. Sargasso Sea