Answer:-
The four main substances recycled during photosynthesis and respiration are carbon dioxide, oxygen, water, and glucose. These two processes work together in a cycle. In photosynthesis, plants take in carbon dioxide and water to produce glucose and release oxygen. Then, during cellular respiration, organisms use oxygen to break down glucose, releasing energy, water, and carbon dioxide. That carbon dioxide and water are then used again by plants. This continuous exchange helps maintain a balance in nature, supporting life by providing energy and recycling essential elements that both plants and animals need to survive and function properly.
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