Why is oxygen depletion in eutrophicated water faster at night than during the day?

Explanation

### Step-by-Step Solution:

**Step 1: Understanding Eutrophication**
- Eutrophication is the process where water bodies become enriched with nutrients, leading to excessive growth of algae and aquatic plants. This can occur naturally but is often accelerated by human activities such as the use of fertilizers and pesticides.

**Step 2: Causes of Nutrient Enrichment**
- Nutrient enrichment occurs when runoff from agricultural fields carries fertilizers (rich in nitrogen and phosphorus) into water bodies. This leads to increased plant and algae growth.

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