The best and most correct answer among the choices provided by the question is the third choice. "Variation in species --> differential reproduction --> heredity --> natural selection --> evolution" <span>is the correct sequence of events leading to evolution.
</span>The premise of Darwin's theory of evolution by natural selection<span> is that all life, from mammals to single celled organisms, is related through descent with modification from common ancestral stock. The mechanism he proposed to explain descent with modification was </span>natural selection<span>.</span>
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