Detailed Explanation:

The Sargasso Sea is a unique region in the North Atlantic Ocean, bounded by four major currents: the Gulf Stream, North Atlantic Current, Canary Current, and North Atlantic Equatorial Current. These currents form an ocean gyre that traps floating Sargassum seaweed, giving the sea its distinctive name and golden appearance.

Unlike conventional seas, it has no land boundaries and is defined entirely by circulating ocean currents. It lies entirely within the North Atlantic, ruling out the Arctic, South Atlantic, and Indian Oceans.

Therefore, the Sargasso Sea is located in the North Atlantic Ocean, making Option 2 the correct answer.