On the diagram above, which of the letters shows an aquifer?

The answer is D.

Explanation:

An aquifer is a underground layer of rock and sand that holds water.

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement

answercharacteristics of place include things like economic activity, architecture,and culture,all of which are human elements that alter or can be influenced by the environment;