Explanation
Correct answer: B.
Choice B is the best answer. The sentence emphasizes a similarity between glaciers and icebergs in Greenland, noting that both melt and thereby contribute to rising sea levels.
Why the other choices are wrong
Choice A
Choice A is incorrect. The sentence provides information about the melting rate of icebergs in Greenland; it doesn’t emphasize a similarity between glaciers and icebergs in Greenland.
Choice C
Choice C is incorrect. The sentence emphasizes a difference between glaciers and icebergs in Greenland, noting that their melting rates depend on different factors; it doesn’t emphasize a similarity.
Choice D
Choice D is incorrect. The sentence explains the conditions under which glaciers in Greenland melt; it doesn’t emphasize a similarity between glaciers and icebergs in Greenland.