What are some advantages of internal fertilization?

Internal fertilization offers several advantages that support the survival of offspring and reproductive success. One significant benefit is that gametes are shielded from predators and the external environment. When fertilization occurs inside the body of the female, the sperm and egg are protected from environmental hazards such as changes in temperature, acidity, or the presence of potential predators, which can occur in external fertilization scenarios. This protection enhances the chances of successful fertilization and development of embryos into viable offspring.

In contrast, other advantages listed, such as a higher number of offspring, increased space for fertilization events, and eliminating the need for mating, do not typically apply to internal fertilization. For instance, internal fertilization usually results in fewer offspring, as the energy and resources are devoted to developing those that do exist within the parent's body. Overall, the protective nature of internal fertilization plays a crucial role in the survival strategy of many species.