What defines a species biologistically?

The definition of a species from a biological perspective is centered on the ability of individuals within that group to interbreed and produce viable offspring. This concept is known as the Biological Species Concept. When individuals are able to mate and produce offspring that can grow and reproduce themselves, it indicates that they belong to the same species. This reproductive connection not only maintains the genetic continuity of the species but also allows for the adaptation and evolution of the group over time.

The ability to produce viable offspring is crucial because it ensures that the genetic traits are passed on to the next generation, contributing to the survival and evolutionary success of the species. When reproductive barriers exist—such as those preventing breeding or producing non-viable offspring—individuals may not be considered the same species. The habitat alone does not define a species; individuals from different species can inhabit the same environment but remain reproductively isolated. Thus, the correct choice emphasizes the importance of reproductive capability and genetic continuity in defining what constitutes a species.