Final answer:
Rainfall in India is due to monsoon winds, while the Tamil Nadu coast gets winter rainfall from the Retreating Monsoon. The Eastern coastal delta gets cyclones due to moisture-rich winds, and parts of Rajasthan, Gujarat and the Western Ghats leeward side are drought-prone due to their rainshadow location.
Step-by-step explanation:
The rainfall pattern in India is mainly due to the monsoon winds that change their direction seasonally, causing most of the rainfall to be concentrated over a few months, especially during the Southwest monsoon period from June to September. The Tamil Nadu coast receives winter rainfall as it is influenced by the Retreating Monsoon (or North-East monsoon) winds from the sea during the winter season.
The delta region of the Eastern coast is frequently struck by cyclones due to its geographical location. It lies within the tropics and is prone to the moisture-laden winds coming from the Bay of Bengal, leading to the formation of cyclones.
Parts of Rajasthan, Gujarat, and the leeward side of the Western Ghats are drought-prone primarily because they lie in the rainshadow area, where the rainfall is considerably low. These regions experience high temperature and low rainfall contributing to frequent drought conditions.
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