The correct answer is D) contour lines.
The elevation is shown on a topographic map in contour lines.
If we see a topographic map, the first thing we note is the contour lines. These lines connect points with the same elevation. This helps to see the elevation of the geographical feature and the shape of the land. On a topographic map, you can also see the index contour and the contour interval. This information helps people to read a topographic map.
Industrialization has historically led to urbanization by creating economic growth and job opportunities that draw people to cities. Urbanization typically begins when a factory or multiple factories are established within a region, thus creating a high demand for factory labor.
