Question

Eskers are glacial features formed when _____.

Answer 1

For the options given below i would say it is answer C: Streams flowing in tunnels beneath glaciers deposit sand and gravel

Answer 2

Answer: streams flowing in tunnels beneath glaciers deposit sand and gravel

Explanation:

Eskers are the glacial features formed when the glaciers melt. The melted ice forms a channel and tunnel in the glacier. These tunnels takes away the debris like gravel and sand along with them. Over the time this debris get compacted and solidifies forming a ridge like feature called as eskers.  

According the above explanation streams flowing in tunnels beneath glaciers deposit sand and gravel