Lichens do not occur in area with

Options

A. Pollution
B. humidity
C. low temperature
D. High temperature

Answer

**Step-by-Step Solution:**

1. **Understanding Lichens**: Lichens are symbiotic organisms composed of a fungus (mycobiont) and an alga (photobiont). The alga performs photosynthesis, providing food for the lichen, while the fungus absorbs water and nutrients from the environment.

2. **Habitat Preferences**: Lichens thrive in various environments, but they are particularly sensitive to certain conditions. They can be found in both humid and arid areas, and they can tolerate a range of temperatures.

3. **Sensitivity to Pollution**: Lichens are known as bioindicators of environmental health. They are particularly sensitive to air pollution, especially sulfur dioxide (SO2). This sensitivity makes them a good indicator of air quality.

4. **Conclusion**: Given their sensitivity to pollution, lichens do not occur in areas with high levels of air pollutants, particularly sulfur dioxide. Therefore, the correct answer to the question is that lichens do not occur in areas with pollution.

**Final Answer**: Lichens do not occur in areas with pollution, specifically high levels of sulfur dioxide.

---