SAT English Practice Question

The passage discusses the importance of protecting the environment for future generations, and it emphasizes that one way to do this is to use less energy. It also suggests that people should reduce their consumption of products that require a lot of energy to produce. The passage concludes by suggesting that the next generation will be in a better position to help protect the environment than the current generation. What is the best way to describe the structure of this passage?

1. A.a problem and solution.
2. B.a cause and effect.
3. C.a comparison and contrast.
4. D.a definition and example.