Explanation:
During the summer (rainy) season, the intense heating of the north-western region of India creates a low-pressure area. This low pressure attracts the moisture-laden south-western monsoon winds from the Indian Ocean toward the Indian subcontinent, causing widespread rainfall.
- (B) North-eastern trade winds blow during winter, not rainy season.
- (C) Cyclones at the equator are rare and do not drive the monsoon.
- (D) Eastern winds is a vague term and not a correct explanation here.
Therefore, the correct answer is: (A) Low air pressure in north-western India.
Explanation by: Mr. Dubey
During the summer (rainy) season, the intense heating of the north-western region of India creates a low-pressure area. This low pressure attracts the moisture-laden south-western monsoon winds from the Indian Ocean toward the Indian subcontinent, causing widespread rainfall.
- (B) North-eastern trade winds blow during winter, not rainy season.
- (C) Cyclones at the equator are rare and do not drive the monsoon.
- (D) Eastern winds is a vague term and not a correct explanation here.
Therefore, the correct answer is: (A) Low air pressure in north-western India.