This process is known as thermohaline circulation. In the Earth's polar regions ocean water gets very cold, forming sea ice. As a consequence the surrounding seawater gets saltier, because when sea ice forms, the salt is left behind. As the seawater gets saltier, its density increases, and it starts to sink.
Answer:
Importance of Parallels
Explanation:
Importance of parallels are following: The parallels are lies which are designed for marking locations on the earth surface. Since these are imaginary lines though the importance is explains the real geographical location of anything on the earth surface.