Which statement explains the flow of heat?
Heat moves from one place to another like a radiating wave.
Heat moves as packets of energy are transferred from one substance to another.
Heat moves as molecules of one substance
collide with molecules of another substance, transferring kinetic energy.

Answer and

Explanation

I believe the correct answer would be the last option. When an electrons moves from an excited state to the ground state, it would release energy. An electron in the excited state would mean that it contains high kinetic energy so to move to a lower state some of these energy should be released.