Question

what would a person drilling a well most likely reach immediately after drilling through the unsaturated zone?
○ a spring
○ an aquifer
○ the water table
○ an impermeable layer

Explanation:

The unsaturated zone (vadose zone) is the subsurface area where pores hold air and some water, but are not fully saturated with water. Directly below this zone is the water table, which is the boundary where the subsurface becomes fully saturated with water. An aquifer lies below the water table, a spring is a surface discharge of groundwater, and an impermeable layer is deeper and not the immediate layer after the unsaturated zone.

Answer:

the water table