Only 5% of the Earth's land is strictly protected from human activities. With this level of protection, which of the following statements is the reason that so many land species are increasingly threatened with extinction?
A. Because conservation biologists say we need to strictly protect 20%.
B. Because so much land is being lost to flooding from rising sea levels.
C. Because of reduced sunlight from atmospheric pollution.
D. Because of a dramatic increase in earthquakes and volcanoes.
Answer: A
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