Sexual selection is a natural process where certain traits increase an individual's chances of attracting a mate. This can lead to the development of features that may not necessarily aid in survival but enhance reproductive success. For example, the bright plumage of a peacock can attract females, even though it may make the male more visible to predators. There are two main types of sexual selection: intersexual selection and intrasexual selection. Intersexual selection occurs when one sex, usually females, chooses mates based on specific traits, while intrasexual selection involves competition among individuals of the same sex, such as male deer fighting for access to females.