The evolutionary process I chose to model was sexual selection. Before the evolutionary force, the antlers on this species of Elk were small. But after, they are larger and more defined. Female Elk are usually attracted to males with bigger antlers because they can provide stronger babies that are more likely to survive in the wild. Therefore the females of the population favored the gene for larger antlers. This is not random, it is a selective process since the females are physically choosing who they want to be with. The source of this variation was genetic factors that gave some individuals measly antlers, and other individuals large antlers.