Fact 1: Melting is when solids are heated above their melting point.

Fact 2: Ice cubes melt in liquid water.

Given the two facts above, answer the question "What, when heated, turns into liquid water?" with the following options: 
- gasoline
 - oil
 - a solute
 - fire
 - ice cubes
 - a prism
 - mussels
 - Energy.


 

     ice cubes    