Biological Oxygen Demand (BOD) is a standard criterion for -
Detailed Explanation:
Answer: Option 3 — Pollution assay in aquatic ecosystems
Biological Oxygen Demand (BOD) is a standard criterion for measuring the amount of dissolved oxygen consumed by microorganisms while decomposing organic matter in water bodies. It serves as a key indicator of water pollution—higher BOD values indicate greater organic pollution and potential harm to aquatic life due to oxygen depletion. BOD testing is widely used in environmental monitoring to assess the health and quality of aquatic ecosystems.
Question 5 of 9 Water Pollution
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