<span>Report your numerical answer in units of nm. Use significant figur</span>
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.
I believe B is your answer.
Hope this helps!
Newton’s first law state that an object in motion stays in motion unless acted upon force so the answer would be RESISTANCE
