What is the crescent-shaped ridge of debris left at the front of a retreating glacier called?

a.
terminal moraine

b.
basin

c.
lateral moraine

d.
drumlin

A.) Terminal moraine, or end moraine, would be correct here.
Basins are large areas that often fill with water following the melting of a glacier.
Drumlins are small hills made of clay from boulders that has been compacted by glacier movement.
Lateral moraines are parallel ridges running alongside the glacier's path due to the accumulation of rock falling onto glacier from the valley wall

In the air and in the lower fre ah water