Which of the following is used as an atmospheric pollution indicator

Options

A. Lepidoptera
B. Lichens
C. Lycopersicon
D. Lycopodium

Answer

To solve the question about which of the following is used as an atmospheric pollution indicator, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for an indicator of atmospheric pollution. We need to identify which organism or substance can indicate the presence of pollutants in the atmosphere.

2. **Identify the Options**: The options provided are likely various organisms or substances. In this case, we need to focus on the ones that are known to respond to pollution, particularly sulfur dioxide.

3. **Research the Indicators**:
- **Lichens**: These are symbiotic organisms made up of fungi and algae. They are known to be sensitive to air quality, particularly sulfur dioxide levels. When sulfur dioxide is present in high concentrations, lichens tend to be absent.
- **Other Options**: Without the specific options listed, we can infer that other organisms like Lycopersicon (tomato) and Lycopodium (a type of clubmoss) are not known to be atmospheric pollution indicators.

4. **Conclusion**: Based on the known characteristics of lichens, they serve as excellent indicators of atmospheric pollution, specifically for sulfur dioxide. Therefore, the correct answer is lichens.

5. **Final Answer**: Lichens are used as an atmospheric pollution indicator.