This "mechanism" in the last sentence of the first paragraph refers to______. The key difference between human and plant compet

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问题 This "mechanism" in the last sentence of the first paragraph refers to______.
The key difference between human and plant competition for survival is that______.

选项 A、the aim of the latter is not to get resources
B、the former is unnecessarily more complicated than the latter
C、the latter has evolved some more complex mechanisms
D、the latter makes the environment more habitable

答案D

解析 细节题。答案可从第三段中末句以及第五段首句找出。
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