The correct answer is: c) monsoon.
Kerala experiences a tropical monsoon climate. This type of climate is characterized by a wet season and a dry season. The wet season is caused by the monsoon winds, which blow from the southwest during the summer months. The dry season is caused by the trade winds, which blow from the northeast during the winter months.
The monsoon winds bring heavy rains to Kerala, which is why the state is known for its lush vegetation and beautiful beaches. The dry season is a good time to visit Kerala if you are looking for a more relaxed vacation.
The other options are incorrect because they do not describe the climate of Kerala accurately. Arid climates are characterized by low rainfall and high temperatures. Semi-arid climates are similar to arid climates, but they receive slightly more rainfall. Humid subtropical climates are characterized by hot, humid summers and mild winters.