The salinity is affected as "freezing increases".
Option: B
Explanation:
The salt is lost in the sea water throughout the freezing process, thereby increasing the salinity of the existing sea water. The fresh water is introduced back into the ocean when the ice melts, eventually freshening it out. The freezing point falls by 0.28 degrees Celsius or 0.5 degrees Fahrenheit for each and every 5 psu rise in salinity, therefore the water starts to freeze in polar regions at 28.8 degrees Fahrenheit or -1.8 degrees Celsius with an ocean salinity of about 32 psu. This makes near-surface water salinity higher.
