The top layers are the youngest and the farther you go down, the older they get. I’ll put it in exact order in a minute.
The answer is pollution.
Groundwater is water under the surface of the Earth which is widely used as a source of freshwater. Thanks to its position, it is <span>not as much vulnerable to pollution such as surface water. However, some leaking of landfills, septic systems and agricultural chemicals that can reach it deep down under the surface can cause groundwater pollution.</span>
Explanation:
They break down the plants and animals they eat
this is because, plants absorb carbon from the atmosphere to grow in the process of photosynthesis, then consumers obtain their food from plants hence obtaining carbon