Though there is no single theory which can explain the origin of south west monsoon, however it is believed that the main mechanism is the differential heating of land and sea during:

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Q: (SSC/0)
Though there is no single theory which can explain the origin of south west monsoon, however it is believed that the main mechanism is the differential heating of land and sea during:

question_subject: 

Geography

question_exam: 

SSC

stats: 

0,24,18,7,24,3,8

keywords: 

{'south west monsoon': [1, 0, 1, 0], 'west trade wind flow': [1, 0, 0, 0], 'cyclonic storms': [2, 0, 0, 1], 'south': [15, 1, 23, 37]}

The correct answer is option 2: Summer months. During the summer months, the differential heating of land and sea is believed to be the main mechanism responsible for the origin of the southwest monsoon. This is because the land heats up more quickly than the sea during the summer season, creating a low-pressure system over the land.

The warm air over the land rises, creating a vacuum effect, and this draws in cooler and moisture-laden air from the ocean. As this moist air is lifted, it condenses and forms clouds, leading to rainfall. This process is known as convection, and it is the primary driver of the monsoon season in the southwest region.

The other options do not accurately explain the origin of the southwest monsoon. Winter months, cyclonic storms, and southwest trade winds are not the main factors responsible for the monsoon`s formation.