Eutrophication in water bodies leads to

Options

A. high DO
B. Low BOD
C. Low DO
D. Optimum dissolved oxygen

Answer

**Step-by-Step Solution:**

1. **Define Eutrophication**: Eutrophication is the process by which water bodies become enriched with inorganic nutrients, particularly nitrogen and phosphorus. This enrichment often comes from agricultural runoff, wastewater discharge, and other human activities.

2. **Understand the Consequences**: The primary consequence of eutrophication is the excessive growth of algae, known as algal blooms. These blooms can block sunlight from reaching aquatic plants and can lead to the death of these plants.

3. **Oxygen Depletion**: As the algae die and decompose, the decomposition process consumes a significant amount of dissolved oxygen (DO) in the water. This phenomenon is referred to as hypoxia.

4. **Identify the Impact on Dissolved Oxygen**: Due to the increased decomposition of organic matter (from dead algae), the levels of dissolved oxygen in the water decrease, leading to low dissolved oxygen conditions.

5. **Conclusion**: Based on the understanding of eutrophication and its consequences, we can conclude that eutrophication in water bodies leads to low dissolved oxygen levels.

**Final Answer**: Eutrophication in water bodies leads to low DO (Dissolved Oxygen).

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