The correct answer is: a) Tropical fruits & vegetables.
Kerala has a tropical climate, which is characterized by warm temperatures and high humidity. This climate is ideal for the cultivation of tropical fruits and vegetables, such as bananas, pineapples, mangoes, and coconuts.
Temperate crops are grown in areas with moderate temperatures. Arid zone crops are grown in areas with little rainfall. Sub-alpine crops are grown in areas with high altitudes.
Kerala’s climate is not ideal for the cultivation of temperate crops, arid zone crops, or sub-alpine crops.