Answer:
Oxygen
Explanation:
Oxygen is essential for us and all other animals to survive. Once we breathe in oxygen, our body uses it, along with sugar that we get through eating, to produce energy, which then allows us to be active. This process is known as respiration.
oxygen and carbon dioxide
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Answers & Comments
Answer:
Oxygen
Explanation:
Oxygen is essential for us and all other animals to survive. Once we breathe in oxygen, our body uses it, along with sugar that we get through eating, to produce energy, which then allows us to be active. This process is known as respiration.
Answer:
oxygen and carbon dioxide