While EVOLUTION is the slow development of ancestors to generations after them, the process through which organisms are believed to have developed and diversified throughout the course of generations from previously earlier forms on Earth, NATURAL SELECTION is considered 'survival of the fittest' in which certain animals in in respective species are better adapted to their environments based on selected traits that they have been naturally gifted with from birth that help them to survive longer than their fellows, and are more likely to reproduce.
