Question

6. Which of the following is considered as an indicator of environmental pollution?
(A)Diatoms
(B)Tigers
(C) Coral Reefs
(D) Lichen​

Answer 1

Answer:

options d.) is correct

lichen

Explanation:

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Answer 2

Answer:

Lichens are the best indicator of environmental pollution mainly SO

2

. Lichen is a mutualistic association of algae and fungi. In areas of excessive SO

2

pollution, lichens cannot grow but only green algae may be seen, thus acting as an indicator for SO

2

.