Option 1: The area is dominated by shifting cultivation due to favorable terrain characteristics. This option suggests that the large concentration of peasant population in South-East Asia is due to the practice of shifting cultivation, where people move from one area to another to cultivate their crops. However, this option does not explain why this practice is more prevalent in South-East Asia compared to other regions.

Option 2: Intensive subsistence farming is practiced in the region. This option provides the correct explanation for why South-East Asia has the largest concentration of peasant population at the global scale. Intensive subsistence farming is a form of agriculture where farmers work intensively on small parcels of land to meet their own basic needs. This type of farming is common in South-East Asia due to the region`s population density, limited land availability, and traditional agricultural practices.

Option 3: The region has a favorable and healthier climate. While a favorable climate may contribute to agricultural productivity, it does not directly explain why South-East Asia has the largest concentration of peasant population globally.

Option 4: The area has a large forested area which is cleared for cultivation of various crops. While deforestation and cultivation of forested areas may be a factor in the region, it does not explain why South-East Asia has a