Final answer:
A species' physiological tolerances determine all of the places it can perform its basic functions and therefore where it can potentially live, which correlates with option A of the choices provided.
Step-by-step explanation:
A species' physiological tolerances determine where it can potentially live based on its ability to perform its basic functions within that environment. This encompasses not only the optimum conditions where the species can live but also the range of conditions it can tolerate. The correct answer to the question is A: All of the places it can perform its basic functions and therefore where it can potentially live.
Species' tolerances refer to the range of environmental conditions that they can endure and still maintain their physiological processes such as metabolism, growth, and reproduction. These tolerances, in turn, inform us about a species' niche and habitat. The niche includes all the biotic and abiotic factors required for a species to survive and reproduce, while the habitat is the physical space in which the species lives.
For example, if a plant species cannot tolerate low temperatures, it will not be found in cold climates. Similarly, animals with specific dietary requirements will not inhabit areas where their food sources are not available. These factors define the potential geographic range of the species but do not necessarily predict where they will be found, as other factors such as competition and human activities also play a role.