Which of the following will result in cultural eutrophication ?

Options

A. It is the natural aging of a lake by nutrient enrichment of its water.
B. It is caused due to pollutants arising as a result of human activities like effluents from the industries and homes.
C. It is caused due to the release of organic nutrients
D. It is caused due to the release of heated effluents.

Answer

To determine which of the given statements results in cultural eutrophication, we need to analyze each option based on the definition and causes of cultural eutrophication.

### Step-by-Step Solution:

1. **Understanding Cultural Eutrophication**:
- Cultural eutrophication refers to the accelerated nutrient enrichment of water bodies due to human activities. This process typically involves an increase in nutrients, particularly nitrogen and phosphorus, which leads to excessive growth of algae and aquatic plants.

2. **Analyzing the Statements**:
- **Statement 1**: "It is the natural aging of a lake by nutrient enrichment of its water."
- This statement describes natural eutrophication, not cultural eutrophication. Therefore, it is **incorrect**.

- **Statement 2**: "It is caused due to pollutants arising as a result of human activities like effluents from the industries and homes."
- This statement correctly identifies that cultural eutrophication is caused by human activities, such as industrial and domestic waste, which introduce excess nutrients into water bodies. Thus, this statement is **correct**.

- **Statement 3**: "It is caused due to the release of organic nutrients."
- While organic nutrients can contribute to eutrophication, this statement does not specifically address the human-induced aspect of cultural eutrophication. Therefore, it is **incorrect**.

- **Statement 4**: "It is caused due to the release of heated effluents."
- This statement refers to thermal pollution, which is not directly related to nutrient enrichment. Hence, it is **incorrect**.

3. **Conclusion**:
- The only statement that accurately describes the cause of cultural eutrophication is **Statement 2**.

### Final Answer:
The correct answer is **Statement 2**: "It is caused due to pollutants arising as a result of human activities like effluents from the industries and homes."

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