Question

PLEASE HELP ASAP! PLEASE DO NOT GIVE ME A VIRUSES!

Answer 1

Answer: Photosynthesis makes oxygen that plants can release into the atmosphere.

Explanation:

Answer 2

Answer:

Option A is right

As in cellular respiration,The animals break down food into glicose and releases energy and when energy is used it produces some amount of carbon dioxide as 4% of co2 is taken by human being but when we exhale air the co2 brcome 21% means increase of co2 gass