Rivers create landforms through three main processes: 1) Erosion, such as hydraulic action, abrasion, and attrition which help form landforms like V-shaped valleys, waterfalls, and interlocking spurs in the upper course. 2) Transportation of material which leads to deposition and the formation of landforms like point bars inside river meanders in the middle course. 3) Deposition which is prominent in the lower course, creating large floodplains and deltas near the river mouth.