Question

which would allow humans to access groundwater?
a well drilled into an aquifer
a well drilled above the water table
an aquifer capped by thick granite
layers of soil and rock above the water table

Explanation:

Groundwater is stored in aquifers. Drilling a well into an aquifer allows access to this water. Drilling above the water - table won't reach groundwater. An aquifer capped by thick granite restricts access, and layers of soil and rock above the water - table don't provide access to groundwater.

Answer:

a well drilled into an aquifer