Is any member of a large class of gaseous, liquid, or solid chemical compounds<span>whose molecules contain carbon</span>
Answer:
They were introduced by humans
Explanation:
I attached a PDF document, just take a part of it that seems to work the best, and put it through a paraphrasing tool so it doesn't get flagged for plagiarism
Respiration= oxygen is converted to CO2
Photosythiesis=sunlight is converted to food for the plant through the chloroplasts and then the plant lets out Oxyegen and takes in CO2
