What can be found where groundwater erodes limestone to form valleys, sinkholes, and caverns?

Here I got it from here

Explanation:

Caves. Caves are one of the types of landforms created by groundwater erosion. Working slowly over many years, groundwater travels along small cracks. The water dissolves and carries away the solid rock.

answer; gravity pulls glaciers down hill and as glaciers flow it pick up rocks and soil;