Eskers are glacial features formed when sediment is deposited in a broad ramp-like accumulation downstream large amounts of debris are deposited along the sides of a glacial valley streams flowing in tunnels beneath glaciers deposit sand and gravel blocks of stagnant ice become buried in drift and eventually melt

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

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

cuz he is really really short, assuming an unorthodox and inherently unlucky configuration of elevator buttons…

explanation: