The answer is Nitrogen fixation
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They all form in great clouds of gas and dust, they begin life with same chemical composition as the Sun: about 3/4 hydrogen and 1/4 helium and no more than 2% consisting of elements heavier than helium. They DIFFER in size, age brightness, and temperature.
The answer is none of the above
Well, protein actually helps you BREATHE, helps BUILD your tissues, and also helps replicate more and more of your DNA . c: