Which numbered feature(s)on this photograph are consistent with the presence of glaciers sometime in the past?

Question

Quizplus · Accepted Answer

All three features (an arête, U-shaped valley, and tarn) are consistent with the presence of glaciers in the past. An arête is a narrow ridge of rock that separates two valleys that were carved out by glaciers. A U-shaped valley is a characteristic feature of a glacier-carved valley, as opposed to the V-shaped valleys that are typically formed by rivers. A tarn is a small lake that forms in a depression in the ground left behind by a glacier. Therefore, all of these features indicate the presence of glaciers in the past.

Which Numbered Feature(s)on This Photograph Are Consistent with the Presence