The author mentions "the green film of plant life that grows on stagnant pools" (lines 6-7

外语类 公共英语 已帮助 人

The author mentions "the green film of plant life that grows on stagnant pools" (lines 6-7) in order to explain ______.

A.how the sun affects lichens

B.why plants depend on water

C.where fungi become algae

D.what algae arc

请帮忙给出正确答案和分析,谢谢!

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