Role of convection in heat transfer inside Earth is most associated with which layer?

Correct answer: Mantle

Correct answer: C, the mantle. Convection is the transfer of heat through the movement of a material: warmer material rises and cooler material sinks. Inside Earth, heat from deeper regions helps produce slow movement within the mantle, especially in the ductile asthenosphere. These movements are associated with the long-term motion of tectonic plates, although plate motion is explained by several forces and not by a single process alone. A is wrong because surface soil is a very thin part of the crust and is not the main layer discussed in Earth’s internal heat transfer. B is an atmospheric layer, not an interior Earth layer. D is surface water and does not explain the major internal heat-transfer system. Memory cue: mantle means moving interior material; convection links heat with slow movement.