Melting wax evaporating gasoline freezing water these changes are all examples of a) nuclear changes. b) physical changes. c) chemical changes. d) energy consumption.

hu !

B) physical changes.

Explanation:

A physical change is defined as a change in which there is alteration in shape, size and state etc. No new substance gets formed in these reactions.

A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.

A nuclear change is defined as a change in which a change in nuclear composition takes place.

Melting wax, evaporating gasoline  and freezing water  are all physical changes as they only involve change of state and no change in chemical or nuclear composition takes place.