Question

Convection refers to the movement of heat through a fluid, such as water. Which best describes one way that convection influences the circulation of ocean water?

Cold water at the surface flows toward the poles and sinks as it cools.
Deep, warm water flows toward the equator and rises as it cools.
Warm water at the surface flows toward the poles and sinks as it cools.
Deep, cold water flows toward the equator and rises as it cools.

Answer 1

Warm water at the surface flows toward the poles and sinks as it cools.

As surface water moves poleward it cools, becomes denser, and sinks, helping drive deep ocean circulation (thermohaline convection).