Concept:Arid-region landforms are either erosional or depositional.Depositional features are made by the accumulation of wind-carried sand and dust.Explanation:A barchan is a crescent-shaped sand dune formed by wind deposition.Zeugen, rock pedestal, and yardang are all erosional landforms shaped by wind abrasion and deflation.Among the listed options, only barchan is a depositional feature of an arid region.Answer:A. barchan