Concept:An oxbow lake is a crescent-shaped lake formed when a river meander is cut off from the main channel.Explanation:The feature marked Q appears as a curved, crescent-shaped body of water beside the river.It is not a meander because the curve is no longer part of the flowing river.It is not a levee, which is a raised bank along a river.It is not an elbow, which is a sharp bend in a river course.Since Q is separated from the main river and retains a curved shape, it is correctly described as an oxbow lake.Answer:D. oxbow lake
