Final answer:
Photosynthesis in plants generates oxygen essential for life and occurs mostly in plant leaves.
Explanation:
Photosynthesis is the process by which plants convert sunlight into energy, producing oxygen as a byproduct. The oxygen produced during photosynthesis is released into the atmosphere and is essential for aerobic organisms. Plant leaves are the major site of photosynthesis, where chlorophyll captures sunlight to convert carbon dioxide and water into oxygen and carbohydrates.
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