The answer is B because I got it
The answer is none of the above, i dont know how but i was just asked the same question and got it wrong so yeah lol
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.
i thnk the answer is A ...........................
