Question

the image shows a topographic map. which area has the greatest elevation difference? close to nixon lane in the lowland marsh at the colorado river near a major highway

Explanation:

On a topographic map, elevation differences are shown by contour lines. Closer contour lines indicate a steeper slope (greater elevation difference). The area near the major highway (with the 500 - unit contour line close to the 450 - unit contour lines) likely has the greatest elevation difference compared to the other areas (lowland marsh and Colorado River areas likely have more gently sloping or flat regions, and near Nixon Lane may not have as close contour lines as near the major highway area).

Answer:

near a major highway