HORTICULTURE

Detailed explanation-1: -Intensive Subsistence Farming: This type of farming is practised in areas of high population pressure on land. It is labour-intensive farming, where high doses of biochemical inputs and irrigation are used for obtaining higher production. Hence, correct answer is option A.

Detailed explanation-2: -Intensive subsistence agriculture is practised in densely populated regions of the world. Requirement of food per unit land area is more in densely populated regions.

Detailed explanation-3: -Intensive subsistence agriculture is prevalent in the thickly populated areas of the monsoon regions of south, southeast and east Asia.

Detailed explanation-4: -Punjab. Hint:The state which still practises intensive subsistence farming is also famous for having the biggest delta in the world, the Sunderban deltas. Nobel Prize winner Rabindranath Tagore also belongs from the same state.