You are presented with the question "what can be done to salt water to cause water to evaporate while salt remains?" and the following answer choices: 
- 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

Now knowing that heating salt water causes the water to evaporate while the salt remains and an increase in temperature is the result of the flow of heat into the system, choose the best answer.


 

        increasing the temperature 