Answer:
Stars produce energy from nuclear reactions, primarily the fusion of hydrogen to form helium. These and other processes in stars have lead to the formation of all the other elements.
HYDROGEN
Explanation:
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The immune system<span> is made up of a chain of cells, tissues, and organs that work together to protect the body. </span>
Plant! The membrane controls what goes into and out of the cells.
water added and bond has been broken so its hydro-lysis. you got it?
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