The correct answer is b) Wetland cultivation.
Wetland cultivation is the most common type of rice cultivation in Kerala. It is a type of agriculture that is practiced in areas with a lot of rainfall. The rice plants are grown in flooded fields, and the water helps to keep the soil moist and the plants healthy.
Dryland farming is a type of agriculture that is practiced in areas with less rainfall. The rice plants are grown in dry fields, and the farmers must rely on irrigation to keep the soil moist.
Terrace cultivation is a type of agriculture that is practiced in mountainous areas. The rice fields are built on terraces, which help to prevent soil erosion.
Shifting cultivation is a type of agriculture that is practiced in tropical forests. The farmers clear a small area of forest, plant rice, and then move on to a new area after a few years.
Wetland cultivation is the most common type of rice cultivation in Kerala because it is the most efficient way to grow rice in the state’s climate. The water helps to keep the soil moist and the plants healthy, and the farmers do not have to rely on irrigation.