Abowl-shaped depression at the head of a glacial valley is a. a horn b. an arête c. a cirque d. a trough

The right option is; C. a cirque

A bowl-shaped depression at the head of a glacial valley is a cirque.

A cirque, (also called corrie) is a bowl shaped basin that has precipitous walls at the head of a glacial valley. Cirque is usually formed by erosion under the bergschrund (series of fissure) of a glacier. The section of a cirque that is cupped shaped is usually steep, while the concave shape is opened on the downhill side. Examples of cirques and their location include; Circo de Gredos in Spain, and Chandra Taal in India.

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