What were Charles Darwin's observations?

Darwin's observatios are; Members of a population of the same species vary in their traits. Traits can be passed from parents to offspring, Populations are capable of producing more young ones than the environment can cope with

Darwin's theory of evolution by natural selection includes four important observations of nature: Members of a population of the same species vary in their traits. Traits can be inherited, or passed from parents to offspring. Populations are capable of producing more offspring than the environment can support.