Answer: The flowing of rivers is not associated with areas of karst topography
underground topography is known as karst land forms Erosion .The word karst originates from “kras” which is a plateau and it means barren land. Erosion is the transportation of material that have been broken down by weathering ( a process of breakage of rocks) . There are various agents of erosion the primary agents are water wind ice glacier and groundwater (underground topography)