Their formulas are opposites.photosynthesis is used to make food In plants and respiration is used to make energy.
Nuclear fusion<span> is the process of combining two lighter nuclei into a single heavy nucleus (part of an atom). This process is also called a nuclear reaction and it releases a large amount of energy. <span>In medium-sized stars such as the Sun, nuclear fusion almost always means the fusing of hydrogen atoms to form helium, but larger stars can produce elements as heavy as iron. </span></span>
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