Which of the following is used an atomospheric pollution indicator?

Options

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

Explanation

To determine which of the following options is used as an atmospheric pollution indicator, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Atmospheric Pollution Indicators**:
- Atmospheric pollution indicators are organisms that are sensitive to pollution levels. They will not thrive or grow in polluted environments.

2. **Evaluate the Options**:
- **Option A: Lepidoptera**: This is an order of insects that includes butterflies and moths. They are not specifically known as pollution indicators.
- **Option B: Lichens**: Lichens are a symbiotic association between fungi and algae (or cyanobacteria). They are sensitive to air quality, particularly sulfur dioxide and other pollutants.
- **Option C: Lycopersicon**: This is a genus of plants that includes tomatoes. They are not used as pollution indicators.
- **Option D: Lycopodium**: This is a genus of clubmosses. They do not serve as indicators of atmospheric pollution.

3. **Identify the Correct Answer**:
- Among the options, **Lichens (Option B)** are the only organisms that are recognized as indicators of atmospheric pollution because they do not grow in polluted areas.

### Conclusion:
The correct answer is **Option B: Lichens**.