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Q: Essential Part for the given word from the following options. Respiration

  • 1
    Oxygen
  • 2
    Carbon monoxide
  • 3
    Mouth
  • 4
    Circulation
  • Show Answer
  • Workspace

Answer : 1. "Oxygen"
Explanation :

Answer: A) Oxygen Explanation: A person or animal must take in oxygen for respiration to occur. A mouth (choice a) is not essential because breathing can occur through the nose. Choices b and d are clearly not essential and can be ruled out.

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