Which terrain feature results from filling a low area to create a level surface?

Which terrain feature results from filling a low area to create a level surface?

• A. Draw
• B. Valley
• C. Saddle
• D. Fill

Answer: (D)

A fill is what happens when you add material to a low spot to bring the surface up to a level grade. This deliberate modification creates a flat, usable surface, such as for roads or landing zones, by deposition rather than natural formation. The other terms describe natural terrain features: a draw is a small drainage channel, a valley is a broad natural low area between hills carved by erosion, and a saddle is a low point or pass between two ridges. None of those involves adding material to create a level surface.

A fill is what happens when you add material to a low spot to bring the surface up to a level grade. This deliberate modification creates a flat, usable surface, such as for roads or landing zones, by deposition rather than natural formation. The other terms describe natural terrain features: a draw is a small drainage channel, a valley is a broad natural low area between hills carved by erosion, and a saddle is a low point or pass between two ridges. None of those involves adding material to create a level surface.