The Amazonian rain forest in South America is home to more than $A$ species of plants and $B$ species of fishes.
- A$A - 3,000, B - 40,000$
- B$A - 1,500, B - 2,500$
- C$A - 40,000, B - 3,000$
- D$A - 427, B - 378$
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