How is salinity affected

A/ evaporation increases

B/ freezing increases

C/ melting increases

D/ precipitation increases

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.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.