A large store of underground water usually contained in porous rocks.

A large store of underground water usually contained in porous rocks.

• A. Aquifer
• B. Atmosphere
• C. Biodiversity
• D. Canopy

Answer: (A)

Groundwater stored in the pores of rocks and sediments forms an aquifer, a natural underground reservoir. When rocks are porous and the pore spaces are interconnected, they can hold large amounts of water and allow it to move slowly through the rock. This makes aquifers the common source of underground water that can be tapped by wells. The other terms refer to different things: the atmosphere is the layer of air around us, biodiversity is the variety of living organisms, and the canopy is the upper layer of a forest.

Groundwater stored in the pores of rocks and sediments forms an aquifer, a natural underground reservoir. When rocks are porous and the pore spaces are interconnected, they can hold large amounts of water and allow it to move slowly through the rock. This makes aquifers the common source of underground water that can be tapped by wells. The other terms refer to different things: the atmosphere is the layer of air around us, biodiversity is the variety of living organisms, and the canopy is the upper layer of a forest.