Concept:Land rotation is a farming system where land is temporarily cultivated and later left to regenerate naturally.Explanation:The farmer cultivates a plot of land for a few years until the soil becomes less productive.The plot is then abandoned to allow natural vegetation to restore soil fertility over time.Meanwhile, the farmer moves to another plot to cultivate, and the process continues in rotation.This practice is called shifting cultivation because the farmer shifts from one land to another.Answer:D. Shifting cultivation