Which of the following seas has highest salinity in the world?

The correct answer is Option (1) → Dead Sea

The Dead Sea, between Jordan and Israel, has a salinity of about 340 grams of salt per litre (around 34%), roughly ten times that of the open ocean (about 35 grams per litre). Water flows in from the Jordan River but has no outlet and leaves only by evaporation in the hot, dry climate, so the salt keeps building up. Its water is so dense that a person floats easily, and almost no life can survive in it.