India I’m guessing there’s no map so
The salinity will sometimes be higher and sometimes be lower than in ocean water far from the river's mouth.
Is your answer
Mark Brainiest
Answer: B continental tropical
Explanation: Continental Tropical air masses (cT) are a type of tropical air produced by the subtropical ridge over large areas of land and typically originate from low-latitude deserts such as the Sahara Desert in northern Africa, which is the major source of these air masses.
https://en.wikipedia.org/wiki/Air_mass
A gravel covered plain is called a Reg. A reg is a desert basin where the sand has been blown away leaving a gravel covered plain.