Concept:Wind deposition creates landforms where wind-blown sand is dropped and accumulates.Explanation:A barchan is a crescent-shaped dune built from sand deposited by wind.It is therefore a true feature of wind deposition.A ventifact is a rock surface polished by wind abrasion, making it a wind erosion feature.An inselberg and a mesa are produced by weathering and erosion, not by wind deposition.Answer:A. a barchan