An example of freezing is when

a. water vapor becomes water droplets.
b. ice becomes water vapor.
c. ice becomes liquid water.

d. melted wax becomes solid wax.

d. melted wax becomes solid wax.

Explaination:

when talking about the states of matter, the word "freeze" (or freezing..etc) is the term used whe describing a liquid matter turning into a solid, rigid matter.

in this case, the melted wax is the liquid matter which turned into solid wax, the side matter.

D, as freezing is when a liquid enters a solid state.

c should be the answer