Why is conduction not an efficient way to move heat through most of the Earth?

Question

Quizplus · Accepted Answer

Rocks are poor conductors of heat, especially in the Earth's mantle where convection dominates the transfer of heat. Conduction would only be efficient in areas where there are high concentrations of heat-producing radioactive elements. Radiation is not considered the most efficient way to move heat through the Earth, as it only accounts for a small amount of heat transfer compared to convection.

Why Is Conduction Not an Efficient Way to Move Heat