Evolutionary processes refer to the mechanisms through which species change over time. These processes include natural selection, where organisms better adapted to their environment tend to survive and reproduce, and genetic drift, which involves random changes in the frequency of traits within a population. Other factors, such as mutation and gene flow, also contribute to the genetic diversity of species. These processes lead to the development of new species and the adaptation of existing ones. Over long periods, evolutionary processes can result in significant changes in physical characteristics, behaviors, and ecological roles, shaping the biodiversity we see today in the natural world.