Explanation Pair 1 is correct: "Ladang" is the term used in Indonesia for shifting cultivation, where farmers clear a piece of land, farm it for a few years, and then move on to another plot after the soil loses its fertility.
Pair 2 is correct: "Ray" is the term for shifting cultivation used in Vietnam, where farmers clear land for cultivation and then move after a few years.
Pair 3 is correct: Milpa" refers to the traditional form of shifting cultivation practiced in Central America, particularly in countries like Mexico, where maize is often the primary crop grown in this system.
Pair 4 is correct: "Roca" is a term used in Brazil for a type of shifting cultivation, especially practiced in the Amazon region.
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