Arabian Sea records higher salinity than the Bay of Bengal because

The correct answer is option 1 i.e Arabian Sea exhibits high rate of evaporation and low influx of fresh water

Explanation:

• Low salinity trend is observed in the Bay of Bengal due to influx of river water by the river Ganga.
• Arabian Sea exhibits high rate of evaporation and low influx of fresh water

Factors affecting Ocean Salinity:

• The salinity of water in the surface layer of oceans depend mainly on evaporation and precipitation.
• Surface salinity is greatly influenced in coastal regions by the fresh water flow from rivers, and in polar regions by the processes of freezing and thawing of ice.
• Wind, also influences salinity of an area by transferring water to other areas.
• The ocean currents contribute to the salinity variations.
• Salinity, temperature and density of water are interrelated. Hence, any change in the temperature or density influences the salinity of an area.

Arabian Sea:

• It is a region of the northern Indian Ocean.
• It is bounded by Pakistan and Iran, on the west by the Gulf of Aden, Guardafui Channel and the Arabian Peninsula, on the southeast by the Laccadive Sea, on the southeast by Somali Sea and on the east by India.

Bay of Bengal:

• It is the northeastern part of the Indian Ocean.
• It is bounded on the west and northwest by India, on the north by Bangladesh, and on the east by Myanmar and the Andaman and Nicobar islands of India. Its southern limit is a line between Sangaman Kanda, Sri Lanka and the north westernmost point of Sumatra(Indonesia).