Answer:
Z, Y, X, W, V or habet if it's a trick question
Tree thinning I'm guessing. I had just learned this recently but I could always possibly be wrong.
Answer:
yeah I got once more thank u❤️❤️❤️
Natural environment has the ability to gather some pollutants yet if too much then the environment could no longer handle it. A leaky sewage can pollute an aquifer with I. arsenic as the contaminant. Arsenic is a metalloid existing in the Earth's crush. Exposure is natural yet can be aggravated by the human activities.