The following text discusses volcanic islands.
The Hawaiian Islands formed through volcanic activity over millions of years. As the Pacific tectonic plate moves over a stationary "hot spot" in Earth's mantle, magma rises to create new islands. The oldest island, Kauai, has eroded significantly, while the youngest, Hawaii itself, continues to grow with active eruptions.
Which choice best describes the function of the last sentence?
It provides specific examples that illustrate the formation process.
It introduces a new theory about island formation.
It contradicts the hot spot explanation given earlier.
It questions whether volcanic activity is still occurring.
Correct Answer: A
Choice A is the best answer. The last sentence gives specific examples (Kauai eroded, Hawaii still growing) that illustrate the ongoing formation process.
- Evidence: The sentence cites "Kauai" (oldest, eroded) and "Hawaii" (youngest, growing).
- Reasoning: These specific islands serve as concrete examples of the geological process described earlier.
- Conclusion: The function is to provide illustrative examples.
💡 Strategy: Ask "What are Kauai and Hawaii doing here?" They are examples of the process.
Choice B is incorrect because it continues the same theory. Choice C is incorrect because it supports the explanation. Choice D is incorrect because active eruptions confirm ongoing activity.