Answer:
1.Horse breathe in the oxygen made by plants and breathe out carbon dioxide as a waste product.
2.Trees—all plants, in fact—use the energy of sunlight, and through the process of photosynthesis they take carbon dioxide (CO2) from the air and water from the ground. In the process of converting it into wood they release oxygen into the air.
3.No life is possible on the earth without plants. Life could not exist on Earth without trees because they produce most of the oxygen that humans and wildlife breathe. Trees absorb carbon dioxide from the atmosphere and release oxygen using the process of photosynthesis. There would also be no rain without trees.
4. It is called cycle because its the samething over and over again.
Explanation:
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