The correct answer is C. Arsenic.
Arsenic is a naturally occurring element that can be found in rocks, soil, and water. It can also be released into the environment from industrial activities, such as mining and smelting. Arsenic is a toxic substance that can cause a variety of health problems, including cancer, skin lesions, and nerve damage.
Bacteria, algae, and viruses are all living organisms. They can be found in water, soil, and air. They can also be found in food and on surfaces. Bacteria, algae, and viruses can cause a variety of health problems, including food poisoning, respiratory infections, and meningitis.
However, they are not considered to be non-biotic pollutants of underground water. Non-biotic pollutants are pollutants that are not living organisms. They can include chemicals, minerals, and radioactive materials. These pollutants can enter underground water through a variety of sources, including natural processes, such as weathering and erosion, and human activities, such as agriculture, industry, and mining.
Arsenic is a common non-biotic pollutant of underground water. It can enter underground water through natural processes, such as weathering and erosion, or through human activities, such as mining and smelting. Arsenic can cause a variety of health problems, including cancer, skin lesions, and nerve damage.