The Gulf Stream is an intense, swift western boundary warm ocean current in the western North Atlantic Ocean. Originating in the warm Gulf of Mexico, it flows through the Straits of Florida, hugs the eastern coast of the United States, and carries enormous quantities of tropical thermal energy northward across the Atlantic towards Western Europe as the North Atlantic Drift.

Option analysis:

• Cold water current: Examples include the Labrador Current, California Current, and Oyashio Current.
• Warm water current: Correct, the Gulf Stream is a premier western boundary warm current.
• Bottom current: Deep thermohaline currents like Antarctic Bottom Water.
• Inshore current: Local wave-driven rip or coastal longshore currents.