The possible effects of a formal system entering an area are the following: sea breeze, a change in air temperature.
Species that have a greater gene pool are scientifically proven to survive better than those that have a smaller gene pool. This is because the species has diversity in the genes allowing them to be able to adapt to different situations. The smaller gene pool has less diversity meaning that it cannot adapt as easily. So, the answer is most likely D. Species A will most likely go extinct and species B will continue to thrive.