The Correct Answer is Intensive subsistence farming. Explanation & Key Takeaways: • In intensive subsistence farming, the farmer cultivates a small plot of land using simple tools and more labour. • Intensive subsistence agriculture is prevalent in the thickly populated areas of the monsoon regions of the south, southeast, and east Asia. Important Notes: Commercial Farming • In commercial farming, crops are grown and animals are reared for sale in the market. • The area cultivated and the amount of capital used is large. Most of the work is done by machines. • Commercial farming includes commercial grain farming, mixed farming, and plantation agriculture. Primitive subsistence farming • Primitive subsistence agriculture includes shifting cultivation and nomadic herding. Extensive subsistence agriculture • Extensive subsistence agriculture is farming in thinly populated areas. • The vast expanse of land is cultivated to yield minimal output of crops and animals for the primary consumption of the grower's family.