Answer:
Glaciers can modify landscapes by eroding or removing rock and sediment. They have two methods for eroding bedrock: Abrasion: The ice at the bottom of a glacier is not always pure, and it often contains particles of rock, dirt, and debris. It's abrasive, like sandpaper. A glacier is formed as ice travels downward under the force of gravity, and glaciers replace rivers in valleys. Ice, like rivers, collects and conveys huge volumes of material. The material erodes the earth as it goes downhill, resulting in exceptionally attractive landforms in highland locations.