Water moves down through ground layers

that is very true

Explanation:

astute observation

Water not used by plants moves deeper into the ground.The water moves downward through empty spaces or cracks in the soil, and sand, or rocks until it reaches a layer of rock through which water cannot easily move. Water seeping down from the land surface adds to the ground water and is called recharged water.

answer; i believe the correct answer is ( proteins );

i am going to guess that it is co2.