See the figure in you text of the evolution of the horse. Implies a single origin of life with one ancestor which, through speciation and extinction has lead to the present Bush of Life of biodiversity. Counters the idea at the time that God was the agent of the integrated ecosystem and that its purpose was to support man. Alfred Wallace is a co-discoverer of natural selection. Animals reproduce to perpetuate their species 3.
Natural selection favors the large, strong and aggressive over the small weak and timid.
Traits that benefit survival of the species will evolve by natural selection even if they reduce individual survival and reproduction. Animals compete so only the strongest will survive in order to assure health of the species. Natural selection prepares organisms to survive in new and changing environments such as the development of antibiotic resistance in bacteria. Natural Selection will hone perfect organisms given sufficient evolutionary time. Only the birds with the larger beaks can eat the larger seeds.