Which one of the following is a wrong statement ?

Options

A. Most of the biodiversity losses have occurred in tropical areas.
B. Ozone in lower part of atmosphere is useful for animals.
C. Greenhouse effect is a natural phenomenon
D. Eutrophication is a natural phenomenon in lakes.

Answer

To solve the question "Which one of the following is a wrong statement?", we need to analyze each statement provided in the options.

### Step-by-Step Solution:

1. **Identify the Statements**: We need to read and understand each statement provided in the options. The question asks for the wrong statement among them.

2. **Evaluate Each Statement**:
- **Statement 1**: Most biodiversity losses have occurred in tropical areas.
- This statement is **true**. Tropical areas are indeed hotspots for biodiversity loss due to various factors such as deforestation and habitat destruction.

- **Statement 2**: Ozone in the lower part of the atmosphere is useful for animals.
- This statement is **false**. Ozone in the lower atmosphere (troposphere) is considered "bad ozone" and is harmful to animals, plants, and human health. It can cause respiratory issues and damage crops.

- **Statement 3**: Greenhouse effect is a natural phenomenon.
- This statement is **true**. The greenhouse effect is a natural process that warms the Earth’s surface, allowing life to thrive.

- **Statement 4**: Eutrophication is a natural phenomenon in lakes.
- This statement is **true**. Eutrophication is a process where water bodies become enriched with nutrients, leading to excessive growth of algae and other aquatic plants.

3. **Conclusion**: After evaluating all statements, we find that Statement 2 is the only incorrect statement. Therefore, the answer to the question is that the wrong statement is the one regarding ozone in the lower atmosphere.

### Final Answer:
The wrong statement is: **Ozone in the lower part of the atmosphere is useful for animals.** (Option 2)

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