Respuesta :
Answer:
A
Explanation:
Human need carbon dioxide to live. they breath carbon dioxide which is the air
Answer:
A.carbon dioxide
Explanation:
oxygen poor blood means the blood is rich with Carbon dioxide
Answer:
A
Explanation:
Human need carbon dioxide to live. they breath carbon dioxide which is the air
Answer:
A.carbon dioxide
Explanation:
oxygen poor blood means the blood is rich with Carbon dioxide