During a study session about evolution, one of your fellow students remarks, 'The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result.' Which statement is most likely to be helpful in correcting this student's misconception?

Darwin's 4 theories of natural selection are: The four propositions underlying Darwin's theory of evolution through natural selection are:

(1) more individuals are produced than can survive; (2) there is therefore a struggle for existence; (3) individuals within a species show variation; and (4) offspring tend to inherit their parents' characters.