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What is a key part of Darwin''s idea of natural selection?

AEarth is very old.
BEverything has a predator.
COrganisms'' characteristics are carried on DNA.
DMore individuals are born than can live on available resources.

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Greenleafable

The correct answer should be D. More individuals are born than can live on available resource. The key idea behind it was that natural selection was survival of the fittest. The fittest could get to resources and avoid predators, while those who couldn't would die out. Eventually there would be an entire species of those who have the traits of those who were the fittest.

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