Here's why:
* Contour lines represent points of equal elevation.
* Closely spaced contour lines indicate a steep slope, as the elevation changes rapidly over a short distance.
* Widely spaced contour lines signify a gradual change in elevation, meaning the land is relatively flat or gently sloping.
Imagine a hill:
* The contour lines at the base of the hill would be close together, showing the steep slope.
* As you move up the hill, the contour lines would gradually spread out, reflecting the gentler incline.
* At the summit, the contour lines would be very far apart, indicating a relatively flat area.
Therefore, widely spaced contour lines on a topographic map indicate a low relief area, where the change in elevation is minimal.
