Freezing means changing from a liquid into a solid by reducing heat energy, and water freezes into ice when cooled. Given these facts, what turns from a liquid into a solid among the following options:
- ice
 - heated water
 - kinetic energy
 - fossil fuels
 - solid, liquid, gas
 - Calcium carbonate
 - cooled water
 - superheated water


 

       cooled water  