Answer;
D. The difference in elevation between the highest and lowest points of a region
Step-by-step explanation;
-Topographic maps show the three-dimensional shape of the land and features on the surface of the earth.
-Most topographic maps make use of contour lines to depict elevations above sea level. The contour lines reveal the shape of the land in the vertical direction, allowing the 3-dimensional shape of the land to be portrayed on a 2-dimensional sheet of paper or computer screen.
-These maps are important in geology because they portray the surface of the earth in detail. This view of the surface shows patterns that provide information about the geology beneath the surface.