Concept:Salinity is the total amount of dissolved salts in seawater, usually measured in parts per thousand (ppt).
Explanation:Salinity increases when evaporation is high and fresh water input is low.
The Baltic Sea receives many rivers and has low evaporation, so its salinity is very low.
The Antarctic Ocean and the Atlantic Ocean have moderate salinity, typically between
34 and
37 ppt.
The Mediterranean Sea is located in a warm, dry region with high evaporation and little rainfall.
It also receives very little fresh water from rivers, so its salinity reaches about
38 to
39 ppt.
Among the given options, the Mediterranean Sea therefore has the highest salinity.
Answer:C. Mediterranean Sea