Correct option is C
Contour lines on a map, which represent points of equal elevation, typically do not merge or intersect. The one exception is in the case of a vertical cliff, where the elevation changes abruptly in a very short horizontal distance. This causes the contour lines to come together or merge, reflecting the vertical rise of the terrain. In other geographic features like caves, valleys, or river beds, the contour lines remain separate, each corresponding to different elevations.
