Answer:
Lichens can be used as air pollution indicators, especially of the concentration of sulphur dioxide in the atmosphere. Lichens are organisms that grow in exposed places such as rocks or tree bark. They need to be very efficient at absorbing water and nutrients to grow there.
The correct answer is B) they operate at a higher efficiency. sorry hope the answers not to late :(
The sun generates its energy by nuclear fusion of hydrogen nuclei into helium.
The answer your looking for is a)
-please give me brainliest answer
