Widely spaced contour lines can also be used to indicate flatter areas. On the other hand, closely spaced contour lines are normally used to represent steep slopes. Contour lines are normally used to connect points that have equal elevations on topographic maps.
Counter lines are the methods for relating the vertical measurement (the third measurement) of the geology of a territory to the two-dimensional surface of a topographic guide, Gentle slants (low edge from even) on topographic maps with a given interim will be spoken to by widely spaced contour lines.
The right option is; b. gentle slope
Widely spaced contour lines indicate a gentle slope .
A contour line is a line that connects points of the same height (elevation) above a specific level. Contour lines are drawn on topographical maps to indicate the elevation of a land along the line. Based on the elevation changes of a land, contour lines may be widely spaced which indicate a gentle slope or it may be packed closely together which indicate steep slopes.