Surface water of lake enrich in having

Options

A. Organic substance
B. Minerals
C. Inorganic substance
D. Pollutants

Explanation

**Step-by-Step Solution:**

1. **Understanding Surface Water of Lakes**: The surface water of a lake refers to the upper layer of water that is exposed to the atmosphere. This layer is crucial for various biological processes and is influenced by environmental factors.

2. **Components of Surface Water**: The surface water of lakes is enriched with various substances, including organic substances, minerals, inorganic substances, and pollutants.

3. **Focus on Organic Substances**: Among these components, organic substances are particularly significant. They consist of large quantities of organic compounds that accumulate on the surface of the lake.

4. **Role of Organic Substances**: These organic compounds serve as substrates for microorganisms. Microorganisms thrive on these organic materials, leading to an increase in their population.

5. **Decomposition Process**: As microorganisms decompose the organic matter, they consume dissolved oxygen from the water. This process is essential for breaking down organic materials but can lead to a decrease in oxygen levels in the water.

6. **Impact on Aquatic Life**: The reduction of dissolved oxygen due to microbial activity can be detrimental to aquatic life, such as fish and other organisms that rely on oxygen for survival.

7. **Conclusion**: Therefore, the surface water of a lake is enriched with organic substances, which play a crucial role in the ecosystem but can also lead to challenges for aquatic organisms if oxygen levels drop significantly.

**Final Answer**: The surface water of a lake is enriched in organic substances.

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