It's either 1 or 4 (hfjsjhsjsjwjje)
RNA has great capability as a genetic molecule; it once had to carry on hereditary processes on its own. It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene.
The answer is the nervous system.
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It is called speciation.
So it'll be D. Speciation
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