What imaginary line on the ground represents points at equal elevation, with closed backward contour lines indicating a depression?

• A. Contour
• B. Tint
• C. Hachures
• D. Relative Relief

Answer: (A)

Contour lines are imaginary lines drawn on a map that connect all points at the same elevation. They show the shape of the terrain and how elevation changes across the landscape. When you see closed contour lines with small hatch marks on the inside, those indicate a depression, with the hatch marks pointing toward the lower area. This is why contour lines are the element described: they represent equal elevations on the ground, and their patterns can reveal depressions. Tint refers to shading to illustrate relief, not a line of equal elevation; hachures are the short marks used on depressions, not the line itself; relative relief is the overall elevation difference in an area, not a single line.