The addition of any substance to water which leads to change in its physical and chemical characteristics is defined as water pollution. It results in

Options

A. Decreased turbidity
B. Increased oxygenation
C. Increased photosynthesis
D. Increased turbidity and deoxygenation

Answer

**Step-by-Step Text Solution:**

1. **Definition of Water Pollution**: Water pollution is defined as the addition of any substance to water that leads to a change in its physical and chemical characteristics.

2. **Consequences of Water Pollution**: The primary consequences of water pollution include increased turbidity and deoxygenation.

3. **Understanding Turbidity**: Turbidity refers to the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye. Increased turbidity indicates a loss of transparency in the water.

4. **Understanding Deoxygenation**: Deoxygenation is the removal or reduction of oxygen from the water. This can lead to an environment where aquatic life, such as fish, cannot survive due to insufficient oxygen levels.

5. **Impact on Aquatic Life**: The increase in turbidity and deoxygenation can result in severe consequences for aquatic ecosystems, including the death of fish and other marine organisms. This disrupts the balance of the ecosystem and can lead to the transfer of toxic materials through the food chain.

6. **Health and Environmental Risks**: Water pollution can make water unsafe for activities such as bathing and fishing, degrade the environment, endanger public health, and destroy fisheries.

7. **Conclusion**: Therefore, the correct answer to the question is that water pollution results in increased turbidity and deoxygenation.