Which geographical feature is associated with the shaping of landscapes by glaciers?

The correct answer, valleys, is associated with the shaping of landscapes by glaciers due to the processes of glacial erosion and deposition. Glaciers move across land, scraping and carving out valleys as they advance and retreat. This erosion often results in U-shaped valleys, which are characteristic of glacial activity.

As glaciers flow, they pick up and transport sediments, rocks, and debris, which can dramatically alter the landscape; when they melt, they deposit this material, creating various landforms. Valleys shaped by glaciers are significant in understanding the history of glacial movements and the geological features they left behind.

In contrast, mountains, plains, and hills can be formed through a variety of geological processes, such as tectonic activity or sedimentation, but they are not specifically associated with the glacial shaping that creates distinctive valleys.