SAT English Practice Question

The passage describes a type of fish that has adapted to life in a very particular environment. The fish has developed unique characteristics that allow it to thrive in this environment, but these characteristics may also make it more vulnerable to changes in the environment. What is the most likely reason why the writer chose to focus on these characteristics?

1. A.highlight the importance of adaptation in the animal world.
2. B.illustrate the challenges that animals face in adapting to new environments.
3. C.emphasize the vulnerability of species to changes in their environment.
4. D.suggest that the fish’s characteristics make it an example of a successful adaptation.