Final answer:
The best description of members of the same species is that they can interbreed and produce fertile, viable offspring of the same species. They share similar DNA, which leads to common inherited characteristics and the ability to successfully reproduce within their species.
Step-by-step explanation:
The statement that best describes members of the same species is They are able to breed with each other and produce offspring of the same species. Members of the same species are unique in that they share a high level of DNA alignment, which allows them to have common characteristics and behaviors conducive to successful reproduction. Most characteristics of organisms are inherited, which means that when these organisms reproduce, their genes ensure that the offspring will belong to the same species and display traits similar to their parents.
Individuals of a species can interbreed and produce fertile, viable offspring. This is a core aspect of what defines a biological species. Different species are separated by the fact that they cannot produce fertile offspring when mated with one another, which is a part of what scientists use to classify and differentiate species.