Melting means changing from a solid into a liquid by adding heat energy.
Heat is energy and is measured in joules.
Melting something is changing phases with heat and is measured in joules.
What is required to melt something?
(A) Heat
(B) Calories
(C) liquid
(D) copper
(E) Joules
(F) warmth
(G) Kinetic energy
(H) sugar