Biological Water Pollution involves which of the following?

Biological Water Pollution involves which of the following?

• A. Bacteria and viruses in the water
• B. Pesticides in water
• C. Metal ions from pipes
• D. Sunlight exposure

Answer: (A)

Biological water pollution is about contamination of water with living organisms that can cause disease or disrupt ecosystems. The option describing bacteria and viruses in the water best fits this idea because these are living microorganisms that directly threaten health and aquatic life when they are present. They require treatment methods like disinfection to protect drinking water and recreational use. Pesticides are chemicals, not living organisms, so they fall under chemical pollution. Metal ions from pipes are also chemical contaminants, usually from corrosion or runoff. Sunlight exposure isn’t a contaminant itself; while it can influence water chemistry and biological growth, it’s not pollution by living organisms.

Biological water pollution is about contamination of water with living organisms that can cause disease or disrupt ecosystems. The option describing bacteria and viruses in the water best fits this idea because these are living microorganisms that directly threaten health and aquatic life when they are present. They require treatment methods like disinfection to protect drinking water and recreational use.

Pesticides are chemicals, not living organisms, so they fall under chemical pollution. Metal ions from pipes are also chemical contaminants, usually from corrosion or runoff. Sunlight exposure isn’t a contaminant itself; while it can influence water chemistry and biological growth, it’s not pollution by living organisms.