What are fluvial landforms?

Fluvial landforms are surface features that have been shaped and sculpted by the action of running water, primarily through processes such as erosion, transportation, and deposition. This category includes various geographical features such as river valleys, deltas, floodplains, and alluvial fans that develop along rivers and streams.

The primary mechanism at play in forming these landforms is the ability of water to erode soil and rock, moving sediments and reshaping the landscape over time. As rivers flow, they carve through land, creating channels and altering the topography. The deposition of sediments occurs when water slows down, leading to the formation of features like deltas where rivers meet larger bodies of water.

The other options describe different geological processes: glacial landforms are shaped by ice movement, volcanic landforms are created by volcanic activity, and aeolian landforms arise from wind erosion. These processes are distinct from the fluvial processes that characterize the features formed by the movement of water. Thus, option B accurately captures the essence of fluvial landforms as the result of running water's influence on the landscape.