What is the question? Or can you list the options to that if that is the question
Puerto Rico <span>not become a U.S. territory </span>
Answer:
The balance of oxygen and carbondioxide is maintained in the atmosphere by the oxygen released by plants during photosynthesis and carbondioxide released by human,animals etc. in the atmosphere. ... The balance of oxygen and carbondioxide is made due to respreration and photosinthesis
Explanation:
