Final answer:
An arête is a sharp bedrock ridge that forms between two glacially carved bowl-shaped depressions, resulting from processes of ice erosion in previously glaciated regions.
Step-by-step explanation:
A sharp bedrock ridge separating two bowl-shaped depressions formed by mountain glaciers is called an arête. These dramatic geological features are the result of glacial erosion and are often seen in regions that were once heavily glaciated, such as the European Alps or the Rocky Mountains in North America. When a mountain range is uplifted, processes like water and ice erosion then sculpt the landscape, carving out steep U-shaped valleys and leaving behind sharp ridges where two glaciers have eroded adjacent valleys.