Which of the following is evidence that an area was once covered by a glacier?

a. loess deposits

b. V-shaped valley

c. U-shaped valley

d. alluvial fan

The correct answer is letter B. V-shaped Valley. It is the evidence that an area was once covered by a glacier. Glaciers form in an area where the temperature is so very low and stayed there for a longer time. Glaciers that reached the oceans form icebergs.