Multiple choice

Which of the following options best describe how is the oxygen in atmosphere replaced?

  1. Through air cycle

  2. Through the ozone layer

  3. Through respiration of plants

  4. Through atmospheric pressure

  5. Through the composition of air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Correct. Plants take in carbon dioxide present in the atmosphere to make food and release oxygen into the atmosphere. This is how oxygen in atmosphere is replaced.

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