Which erosion type is specific to the flow of water over land?

The type of erosion that is specific to the flow of water over land includes rill erosion, sheet erosion, and gully erosion. Each of these processes involves the movement of water, which is a key factor in their formation.

Rill erosion occurs when water concentrates in small channels, forming tiny ditches on the land surface. This process is often noticeable on sloped areas where water runoff can gather, leading to the progressive removal of soil.

Sheet erosion, on the other hand, is characterized by the uniform removal of thin layers of soil across large areas, typically caused by rainfall and surface water runoff. It can be difficult to detect initially because the erosion happens gradually and evenly, which can result in significant soil loss over time.

Gully erosion represents a more advanced stage of rill erosion and involves the formation of larger channels or gullies as water volume increases and more erosion takes place. This can occur after heavy rainfall or during rapid runoff events, where the force of flowing water can substantially cut into the soil.

Therefore, since all three types of erosion are directly related to the movement of water over the land, the correct answer encompasses all of these processes as they share the common characteristic of being caused by water flow.