Fact 1: Heating salt water causes the water to evaporate while the salt remains.

Fact 2: An increase in temperature is the result of the flow of heat into the system.

Given the two facts above, answer the question "what can be done to salt water to cause water to evaporate while salt remains?" with the following options: 
- freezing the salt
 - adding more water
 - DNA damage and mutations
 - lowering the temperature
 - cools it down
 - exposure to cold
 - fissures of hot, acidic water
 - increasing the temperature


 

        increasing the temperature 