Final answer:
Antarctic bottom water is noted for its extreme salinity due to the freezing and formation of sea ice in the Antarctic region.
This correct answer is a)
Step-by-step explanation:
Deep below the surface of the Antarctic Ocean, there is a dense and cold water mass known as Antarctic bottom water.
It is noted for its extreme salinity, making it one of the saltiest and densest bodies of water in the world.
The high salt content is a result of the freezing and formation of sea ice in the Antarctic region, which concentrates the salt in the remaining water.
This correct answer is a)