The correct answer is c) Southwest Monsoon.
The Southwest Monsoon is a seasonal wind that blows from the southwest towards the northeast across the Indian subcontinent from June to September. It is caused by the difference in temperature between the land and the ocean. The land heats up faster than the ocean, causing the air to rise. This creates an area of low pressure over the land. The air from the ocean, which is cooler and at higher pressure, flows in to fill this low pressure area. This is the Southwest Monsoon.
The Southwest Monsoon is responsible for most of the rainfall in Kerala. The state receives an average of 3,000 mm of rainfall per year, most of which falls during the monsoon season. The monsoon rains are essential for the state’s agriculture and economy.
The other options are incorrect because:
- Summer is not a monsoon season. The monsoon season in Kerala is from June to September.
- Winter is not a monsoon season. The monsoon season in Kerala is from June to September.
- Northeast Monsoon is not the major season responsible for Kerala’s heavy rainfall. The Southwest Monsoon is the major season responsible for Kerala’s heavy rainfall.