Concept:Wind erosion is most effective in dry regions with limited vegetation.Explanation:Wind erosion occurs when moving air lifts and transports loose soil particles.This process is greatest where rainfall is scarce.It also thrives where plant cover is thin and the ground surface is dry and loose.These conditions are commonly found in deserts and semi-deserts.Such places are classified as arid areas.Thus, wind erosion is most common in arid areas.Answer:A. arid areas