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Oxygen is returned to the atmosphere mainly bya)Burning of fossil fuelb)Photosynthesisc)Respirationd)FungiCorrect answer is option 'B'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Oxygen is returned to the atmosphere mainly bya)Burning of fossil fuelb)Photosynthesisc)Respirationd)FungiCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Oxygen is returned to the atmosphere mainly bya)Burning of fossil fuelb)Photosynthesisc)Respirationd)FungiCorrect answer is option 'B'. Can you explain this answer?.

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