Concept:Shifting cultivation is an agricultural practice where land is cleared, farmed for a few years, and then abandoned for natural regeneration. Different regions call it by different local names.Explanation:Milpa is the term used in Yucatan and Guatemala.Roca is the term used in Brazil.Milya is the term used in Mexico and Central America.All these names refer to the same farming method – shifting cultivation.Thus, the list given in the question are local names for shifting cultivation, not for a specific crop or farming type.Answer:B. Shifting cultivation