Answer:
The right answer to this question is option D. an increasing number of resources and niches become available for animals.
Explanation:
The main reason for that is that, the process of ecological succession will happen when a biome, for example, gets destroyed for some reason, and it has to get to its climax point again, and for this to happen, it'll take a pretty good amount of time, and in the meanwhile, the resources will start rising again for the populations that will start living in this "new" area again.
