Final answer:
Sexual selection favors traits that increase reproductive success, while natural selection favors traits that increase survival and reproduction.
Step-by-step explanation:
Sexual selection favors traits that increase reproductive success, specifically in attracting mates. This often leads to distinct phenotypic differences between males and females, known as sexual dimorphisms.
Examples of sexual selection favoring specific traits can be seen in the Galapagos marine iguanas, where males with more vibrant colors and ornaments are preferred by females. On the other hand, natural selection favors traits that increase an individual's survival and ability to reproduce, such as adaptations to the environment or physical traits that aid in survival.