The correct option is B Convection
Answer is B.
Convective heat transfer, often referred to simply as convection, is the transfer of heat from one place to another by the movement of fluids. The moving fluid carries energy with it. The fluid flows from a high temperature location to a low temperature location. It is usually the dominant form of heat transfer in liquids and gases. This distinct method of heat transfer, involves the combined processes of conduction (heat diffusion) and advection (heat transfer by bulk fluid flow).