alleryLichens on tree trunks can show what about a place?
ASoil depth
BAir quality
CRainfall total
DWind direction
Answer & Solution
Correct answer: B. Air quality
1. Lichens are known to be sensitive to air quality.
2. Comparing lichens on roads with heavy traffic and cleaner places shows the effect.
3. Soil, rain and wind are not the indicator named in the example.
_Source: NCERT Habitat and Learning position paper, 3.6 Comparative Method_
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