Q. A location with luxuriant growth of lichens on the trees indicates that the :
A) Trees are very healthy
B) Trees are heavily infested
C) Location is highly polluted
D) Location is not polluted
Explanation
[Solution] Lichens are sensitive to $SO_2$; luxuriant growth indicates clean air. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.