Adding salt to a solid decreases the freezing point of that solid, and when seawater freezes, salt is expelled from the solid in a concentrated salt solution called brine. Given these facts, what happens to salt in seawater as it freezes at the freezing point among the following options:
- vaporization
 - boiling
 - expelled
 - salinity
 - evaporation
 - less water
 - water vapor
 - Temperature


 

   expelled      