Which is the best example of how humans impact topography?

Which is the best example of how humans impact topography?

• A. Strip mining an area for minerals
• B. Building cities on hills
• C. Planting trees on slopes
• D. Erecting dams in valleys

Answer: (A)

Topography is the surface features of the land—the shapes and elevations you see on the ground. Strip mining directly changes those features by removing large amounts of soil and rock to extract minerals, creating big open pits, waste piles, and altered drainage. That physical reshaping leaves the land’s contours and elevations visibly and permanently altered. The other options involve changes in use or vegetation rather than making such dramatic landform changes. Building cities on hills changes how the land is used and can modify surface features with roads and structures, but it doesn’t carve out new landforms in the same way. Planting trees on slopes helps stabilize soil and reduce erosion without drastically changing the land’s shape. Erecting dams in valleys alters water features and can flood areas to form a reservoir, changing the landscape, but strip mining shows the most direct and substantial alteration of the land’s surface itself.

Topography is the surface features of the land—the shapes and elevations you see on the ground. Strip mining directly changes those features by removing large amounts of soil and rock to extract minerals, creating big open pits, waste piles, and altered drainage. That physical reshaping leaves the land’s contours and elevations visibly and permanently altered.

The other options involve changes in use or vegetation rather than making such dramatic landform changes. Building cities on hills changes how the land is used and can modify surface features with roads and structures, but it doesn’t carve out new landforms in the same way. Planting trees on slopes helps stabilize soil and reduce erosion without drastically changing the land’s shape. Erecting dams in valleys alters water features and can flood areas to form a reservoir, changing the landscape, but strip mining shows the most direct and substantial alteration of the land’s surface itself.