Which of the following is incorrect?

Erosion involves acquisition and transportation of rock debris.

By abrasion the relief degrades, i.e., the landscape is worndown.

The erosion agents act as aggradational or depositional agents also.

Deposition is a consequence of erosion, it is not the work of any agent.

Five basic factors control the formation of soils, parent material, topography, climate, biological activity, and time.