Biological oxygen demand (BOD) is a standard criterion for
Pollution assay in aquatic ecosystems
The correct option is C:
Explanation of correct option-
Explanation of incorrect option-
Option A-
Option B-
Oxygen levels in forest ecosystems can be measured by Audus apparatus or by counting the bubbles evolved from the pondweed.
Option D-
Oxygen levels in high-altitude regions cab are assessed by oxygen meter.
Final answer: Biological oxygen demand (BOD) is a standard criterion for Pollution assay in aquatic ecosystems