Question

_____________are narrow, knife like mountain ridges formed by the erosion of two or more adjoining ​

Answer 1

Answer:

An arête is a narrow ridge of rock which separates two valleys. It is typically formed when two glaciers erode parallel U-shaped valleys. ... The word 'arête' is actually French for edge or ridge; similar features in the Alps are often described with the German equivalent term Grat.

Explanation:

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Answer 2

Explanation:

A jagged, narrow ridge that separates two adjacent glacier valleys or cirques. The ridge frequently resembles the blade of a serrated knife. A French term referring to the bones in a fish backbone.