What was Charles Darwins contribution to the theory of evolution

Explanation:

Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809-1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.

the statement is true

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.