Which energy is distributed by the global belt?

• A. Salt
• B. Thermal energy
• C. Nutrients
• D. Oxygen

Answer: (B)

Global ocean circulation distributes energy mainly as heat. Warm surface currents carry heat from the tropics toward higher latitudes, while cooler waters return toward the equator at depth, creating a global conveyor belt that helps regulate climate. Salinity, nutrients, and oxygen are also moved around by these flows, but the energy being distributed most directly is thermal energy—the heat that these currents transport.