BOD of polluted water is increased by
Correct answer: B. Algae
- A. Moss
- B. Algae
- C. Ferns
- D. Distillated wastes
Explanation
Excess algae can cause an algal bloom; when the algae die, microbes decompose them and consume dissolved oxygen, raising BOD. Mosses and ferns are not typical causes of increased BOD in polluted water.
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