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, closer contour lines mean a steeper slope and greater elevation difference over a short distance. The area near the major highway (left side of the map) has contour lines (500, 450) that are much closer together than the other areas: Nixon Lane, lowland marsh, and Colorado River have widely spaced or flat contour lines, indicating little elevation change.

Answer:

near a major highway