This "mechanism" in the last sentence of the first paragraph refers to______. The evolution of the mangrove species is describe

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问题 This "mechanism" in the last sentence of the first paragraph refers to______.
The evolution of the mangrove species is described to______.

选项 A、illustrate the similarities of human society to the natural world
B、provide a contrastive example to the development of human society
C、explain how Nature ruthlessly gets rid of the weaker species
D、how plants evolve to maintain their quality of life

答案B

解析 细节题。第二段首句指出"我们通过考察一种生态系统的演变与人类社会相比较…"可见答案为B。
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