Which best describes the way sunlight creates global ocean currents?

Sunlight warms the waters on the ocean surface. Some heat  energy is transferred to cooler waters through convection.  

Explanation:

Convection is the process through which the heat energy is transferred from the hot water to the cool water. In the Ocean when water from different areas in different temperatures comes together convection happens.

Sunlight heats the surface water then the heated water when moves up pushes the cold water to attain its position. Sunlight when touches the ocean surface warms it and then the warmth travels across the cooler waters through the process of convection. Convection is the heat transferring process and this temperature difference creates the ocean current.