Fact 1: Adding salt to a solid decreases the freezing point of that solid.

Fact 2: When seawater freezes, salt is expelled from the solid in a concentrated salt solution called brine.

Given the two facts above, answer the question "What happens to salt in seawater as it freezes at the freezing point?" with the following options: 
- vaporization
 - boiling
 - expelled
 - salinity
 - evaporation
 - less water
 - water vapor
 - Temperature


 

   expelled      