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What is the main mechanism of rainfall on the Tamil Nadu coast during the retreating monsoon?

Answer and explanation

Correct answer: North-east winds pick moisture from the Bay of Bengal and strike the coast

The direct answer is A, north-east winds picking up moisture from the Bay of Bengal and striking the coast. During the retreating or northeast monsoon, winds generally move from land toward the sea, but after crossing the Bay of Bengal they collect moisture. When these moist winds reach the Tamil Nadu coast, clouds and rainfall develop; cyclonic disturbances can also enhance rain, but the listed mechanism is the main one here. Option B is wrong because Himalayan winds do not directly provide this coastal moisture mechanism. Option C is wrong because the Aravallis are a mountain range, not a wind system. Option D is wrong because dry Thar air does not itself become rain without moisture and uplift. Option A correctly links wind direction, the Bay of Bengal, moisture, and Tamil Nadu rainfall. Memory cue: Tamil Nadu receives important rain from the northeast monsoon.

Related tags

ClimateRetreating-MonsoonTamil-Nadu

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