• Metals are particularly good conductors of heat because their particles are very closely packed so the vibrations are passed on very quickly.
• These drift slowly through the structure, giving metals their strength and other properties. As the metal is heated the free electron closest to the heat source are heated.
• The heat transfer takes place by conduction in metal. In solids the heat transfer occurs due to temperature difference by molecular lattice vibrational energy transfer and also by free electron transfer.

Hence, the correct option is (C).