Answer:
b. an arete
Step-by-step explanation:
- An arete is a narrow region of the rocks that separates the two valleys and is and is typically formed when a glaciers erode a d forms a parallel U shaped valleys and can also b formed when the toe glaciers cirques erodes head wards one another leading to the formation of a col also called as a saddle-shaped pass. Example of the Knife Edge, in the Baxter State Park, of the Maine.