Question

4 what is an aquifer? a the impermeable layer that traps water below the surface b a saturation zone with plenty of water for human use c a well dug to the edge of the water table d the layers of soil and rock that filter groundwater

Explanation:

An aquifer is a geological formation, layer, or group of layers that is saturated with groundwater and can yield useful quantities of water to wells and springs. It is a saturation - zone with water available for human use. Option A describes an aquitard (impermeable layer), option C describes a well, and option D describes the function of soil and rock layers related to groundwater filtration rather than an aquifer itself.

Answer:

B. A saturation zone with plenty of water for human use