Organisms are grouped by how they get energy.
Answer:
I belleive A is the correct answer, here is why
Region: geography, regions are areas that are broadly divided by physical characteristics, human impact characteristics, and the interaction of humanity and the environment.
If that is correct then it is compleetly possible for animals to migrate over different regions
Una de las funciones del utero es albergar el ovulo fecundado para que se desarrolle el feto.