At area 1, a stream empties into the ocean. at area 2, precipitation enters the ocean in the form of rainfall. at area 3, evaporation takes place at the ocean’s surface. in which areas does the salinity of the ocean decrease?

Evaporation of ocean water and formation of sea ice both increase the salinity of the ocean. However these "salinity raising" factors are continually counterbalanced by processes that decrease salinity such as the continuous input of fresh water from rivers, precipitation of rain and snow, and melting of ice.

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