Answer: Convection
Explanation: Convection is a method of heat transfer through the movement of fluid. Convection occurs in liquid and gases. In convection cells in a the body of fluids, liquid and gases due to differential density in the body of the fluid. The general principle in a convection cell involves fluid warming resulting in density loss and fluid is forced into a region of greater density moving horizontally as wind to that location, it then cools and descend moving horizontally back to its origin.