What is a key part of Darwin''s idea of natural selection? A. Earth is very old. B. Everything has a predator. C. Organisms'' characteristics are carried on DNA. D. More individuals are born than can live on available resources.
"C. Organisms' characteristics are carried
on DNA." would be the best fit, although this still isn't really the core idea behind natural selection, which is that animals survive based on how "fit" they are for their environment.
