Answer:
potential breakthrough in science and technology which may be found through Centralia fire.
Step-by-step explanation:
The author choose to end the passage with this sentence to present the potential breakthrough in science and technology which may be found through Centralia fire.
The author says that the coal mine fire which have been burning underneath Centralia for 40 years can provide information to researchers about Centralia's soil, plants, and animals.
He also believes that the effects of the underground fire will help scientists to understand on how the planet came into existence.