Some organisms are sensitive to different levels of air pollution and are used as pollution indicators. Suggest which among the following fits into the category

Fungi

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Fresh water algae

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Bacteria

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Lichens

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Solution

The correct option is D
Lichens

The correct option is D.
Explanation of the correct option :
Lichens are used as the indicators of air pollution.
These structures grow on tree bark and rocks.
Air pollutants which are in the gaseous forms get dissolved in the rainwater, especially $S O_{2}$ (Sulfur dioxide) can damage lichens, and check them from growing.
In places where lichens are not growing, it indicates that the air is heavily polluted with sulfur dioxide and other pollutants.
Final answer: Hence the correct option is Lichens .

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Lichens are sensitive to which component of air pollution.

_{2}

S O_{2}

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