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A sinuous ridge of coarse material left by a stream flowing under the ice is an:

AEsker
BDrumlin
CMoraine
DCirque
Answer & Solution
Correct answer: A. Esker
1. Meltwater flows in channels beneath the glacier. 2. The ridge left is an esker. 3. Drumlins are oval ridges of till. _Source: syllabus Fundamentals of Physical Geography, Chapter 7, Landforms and their Evolution._
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