A series of closely spaced contour lines represents a A. steep slope B. gentle slope C. uniform slope D. plane surface

The correct answer is A. steep slope.

A series of closely spaced contour lines represents a steep slope. This is because the contour

A gentle slope is represented by a series of widely spaced contour lines. This is because the contour lines are farther apart when the slope is gentler. The farther apart the contour lines, the smaller the change in elevation over a short distance.

A uniform slope is represented by a series of contour lines that are evenly spaced. This is because the slope is the same throughout the area. The contour lines are evenly spaced regardless of the change in elevation.

A plane surface is represented by a series of contour lines that are parallel to each other. This is because there is no change in elevation on a plane surface. The contour lines are parallel to each other because they represent the same elevation.