I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
i would say D. ! :) let me know if this is correct
Answer: (A) the time that two species have been evolving independently.
Explanation: The molecular clock is figurative term for a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when<u> two or more life forms.</u>