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

Fact 2: Most of Earth's water is salty seawater.

Given the two facts above, answer the question "What, if heated, evaporates while salt remains?" with the following options: 
- hydration
 - Energy.
 - spring
 - Solar energy
 - seawater
 - salinity
 - Solutions
 - energy


 

     seawater    