Temperature is a measure of the average kinetic energy of molecules, primarily dependent on their velocity. This is contrasted with heat, which represents total energy transfer. Therefore, the main difference is that temperature solely depends on the velocity of molecules within a body. ;
Temperature is a measure of the average kinetic energy of the molecules in a substance and primarily depends on their velocity. In contrast, heat refers to the total energy transferred due to temperature differences. Therefore, the correct answer is D) velocity of molecules within a body.
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