Which of the following is not a feature of river erosion?

Deltas are not a feature of river erosion. River erosion occurs when the flowing water of a river wears away at the surrounding rock and soil over time. This erosion can lead to the formation of various landforms such as waterfalls, gorges, V-shaped valleys, and interlocking spurs. However, deltas are not formed by the process of erosion. Deltas are formed when sediment, such as sand and silt, is carried by a river and then deposited at the mouth of the river where it meets a larger body of water, such as a lake or an ocean. Over time, the deposited sediment builds up, creating a delta landform. This process is known as deposition, not erosion.