Question

which material is an aquifer layer most likely made of?
soil
clay
solid granite
cracked rocks

Explanation:

An aquifer is a layer that can hold and transmit groundwater. Cracked rocks have spaces (pores/fractures) to store and allow water flow. Soil has low permeability for large - scale water storage as an aquifer. Clay is impermeable (forms aquitards). Solid granite is non - porous and doesn't allow water flow. So cracked rocks are the most likely material for an aquifer layer.

Answer:

D. cracked rocks (assuming the options are labeled as A. soil, B. clay, C. solid granite, D. cracked rocks; if the original option numbering is different, adjust the identifier but keep the text "cracked rocks" with its correct option label)