Answer:
The landforms and elevations
Explanation:
A topographic map or topo map uses a system of contour lines to show the different landforms in a particular place. The landforms thereby helps to delineate the relief of a particular region.
Contour lines are lines in a topographical map that joins places with the same elevation. The sequences or patterning of contours reveals a lot about a terrain. When contours are close together, an area can best be predicted to have a steep slope but contours far apart shows a gentle terrain.
Topographical maps are usually the base maps for other types of maps because of their importance.
The main idea of this paragraph is A
