Question

where is groundwater found?
○ in lakes and rivers
○ below earth’s surface
○ on ice sheets at the poles
○ at the mouths of rivers and streams

Explanation:

Groundwater is water that exists underground in soil pores and fractures in rock. It is not found in lakes and rivers (that's surface water), at the mouths of rivers and streams (also surface water), or on ice sheets at the poles (glacial ice). It is located below Earth's surface.

Answer:

below Earth's surface