In the early 20th century, geologists did not understand how continents moved. Many believed the Earth's crust was static. But meteorologist Alfred Wegener proposed that this idea was wrong. Using evidence from fossils and rock formations on different continents, Wegener showed that the landmasses were once joined and had drifted apart.
Which choice best describes the function of the underlined sentence in the text as a whole?
It describes the specific evidence Wegener used.
It identifies the scientific consensus that Wegener challenged.
It explains why Wegener was a meteorologist.
It proves that the Earth is flat.
Correct Answer: B
Choice B is the best answer. The sentence states: "Many believed the Earth's crust was static." The text then introduces Wegener, who proved this wrong. Thus, it identifies the challenged consensus.
Choice A is incorrect. Evidence comes later. Choice C is incorrect. It doesn't explain his career choice. Choice D is incorrect. It discusses crust movement, not Earth's shape.