Question

The forests are the biomes that provide the world with most of its clean air.
a. true
b. false

Answer 1

True, if we are talking about Green forests. Through The photosynthesis, the trees uses Carbon dioxide to produce Oxygen, based on the reaction:
6CO2 + 6H20 --> C6H12O6 + 6O2

Hope this Helps! :)

Answer 2

Answer: This would be A. True