<span>Federal laws can override state laws.
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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.
The Namib and Kalahari are the two deserts in Southern Africa.
