Question

(b) There is higher salinity in the northern
Red Sea while lower in the southern.​

Answer 1

The northern part of the Red Sea is more saline than the southern part because it mainly has the Gulf of Suez water which lies to the west of the Sinai Peninsula. The water from the Gulf of Suez is known to have a salinity of about 40 parts per thousand, owing in part to evaporation, and consequently a high density.