According to the U.S. Endangered Species Act (ESA), the difference between an endangered species and a threatened one is that
A) an endangered species is closer to extinction.
B) a threatened species is closer to extinction.
C) threatened species are endangered species outside the U.S. borders.
D) endangered species are mainly tropical.
E) only endangered species are vertebrates.
Answer: A) an endangered species is closer to extinction.
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