Hey there!
The correct answer would be B. Aquifer.
To start, groundwater is water located under the ground, instead of on the surface of the Earth. Bodies of water such as rivers, lakes, and oceans are non-examples of groundwater since they are located on the surface of Earth.
This would eliminate choice D. Lake, and B. Runoff (runoff is water that does not sink into the ground after precipitation and such).
The answer would also not be A. Glacier, since glaciers are located above the Earth.
The final answer would be C. Aquifer, since aquifers are located below the ground and are made of a permeable rock that allows water to seep into it and be stored.
Hope this helps and have a nice day! :)
