Option 1: Gulf of California - Baltic Sea - Red Sea - North Sea

Option 2: Baltic Sea - North Sea - Gulf of California - Red Sea

Option 3: Red Sea - Gulf Of California - North Sea - Baltic Sea

Option 4: North Sea - Gulf of California - Baltic Sea - Red Sea

The correct sequence in the increasing order of salinity concentration is option 2: Baltic Sea - North Sea - Gulf of California - Red Sea. This means that the Baltic Sea has the lowest salinity concentration, followed by the North Sea, Gulf of California, and finally the Red Sea.

Salinity is a measure of the salt content in water. The Baltic Sea is a brackish sea, meaning it has a low salt content due to the high freshwater input from rivers and low evaporation rates. The North Sea has a slightly higher salinity as it is more open to the Atlantic Ocean.

The Gulf of California, also known as the Sea of Cortez, has a higher salinity than the North Sea as it is an enclosed body of water with high evaporation rates. Lastly, the Red Sea has the highest salinity concentration among the four options due to its high evaporation rates and limited freshwater input.

It is important