the process which utilizes the oxygen present in air
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Answer:
photo synthesis
Explanation:
because because the trees required oxygen in the process of photosynthesis
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Answer:
RESPIRATION (SIMPLE)
Explanation:
respiration
Breathing or external respiration: This is the process of taking in oxygen-rich air and giving out carbon dioxide-rich air. Cellular respiration or internal respiration: This is the process of breakdown of food in the presence of oxygen into carbon dioxide and water to release energy.
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