Rivers shape the landscape over time through erosion, transportation, and deposition processes. As rivers flow, they erode the land by carrying and breaking down sediments, rocks, and soil. This erosion widens river channels and creates valleys. The sediments carried by the river are then transported downstream, where they can be deposited along the riverbanks or at the river mouth, forming features such as deltas. Over time, these processes can create canyons, floodplains, meanders, and other landforms that make up the diverse landscapes shaped by rivers.