The reason behind the match between the types of shifting cultivation (List - I) and their corresponding areas (List - II) is as follows:

Jhumming (A): This type of shifting cultivation is practiced in the N.E. states of India. It involves clearing a piece of land, cultivating it for a few seasons until the fertility of the soil decreases, and then moving on to a new plot.

Milpa (B): Milpa is a type of shifting cultivation practiced in Central America and Mexico. It is characterized by clearing land, planting crops for a few seasons, and then leaving it fallow for natural regeneration.

Ladang (C): Ladang is a term used for shifting cultivation in Indonesia. It involves clearing land, planting crops for a period, and then moving to a new area as the fertility of the soil diminishes.

Roka (D): Roka is a type of shifting cultivation practiced in Brazil. Similar to other forms, it involves clearing land, cultivation for a few seasons, and then shifting to a new area.

These practices are examples of shifting cultivation, where agricultural activities are shifted from one plot of land to another over time, allowing for the regeneration of the soil in the abandoned areas. The specific names may vary in different regions, but the underlying concept of rotating cultivation areas is a common feature.