Which major ideas did charles darwin introduce in his writings?
(there can be more than one answer o. o)

a.) the social contract
b.) the germ theory of disease
c.) natural selection
d.) survival of the fittest

i think it is c, i am kinda thrown off by the "more than one can be correct" part

The major ideas that Charles Darwin introduce in his writing are :
- Natural Selection
- Survival of the fittest

They both actually correlated to one another. Natural selection that occurs, force the organisms that live in it to compete. Eventually, the one that survive are only the one that is fit to live in that nature

This answer would be c