Fact 1: Freezing means changing from a liquid into a solid by reducing heat energy.

Fact 2: Ice is a cold frozen liquid.

Given the two facts above, answer the question "How is ice made?" with the following options: 
- The area was once underwater
 - Melting it
 - Drying it out
 - salt and water.
 - It gets heated up
 - It used to be covered by water
 - Boiling the water
 - Reducing heat energy


 

        Reducing heat energy 