Which of the following is a false statement regarding rainforests? a. the amazon rainforest holds one-tenth of all mammal species. b. rainforest plants account for 25 percent of all medicines found in drugstores. c. rainforests cover about half of the earth's surface. d. rainforests are crucial to the conversion of carbon dioxide to oxygen.

C.Rainforests cover about half of the earth's surface.

other sources of text

explanation:

this can be magazines, news reports, scholarly articles, textbooks, research papers etc.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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