13. Why did the author mainly write the passage? A. To persuade the reader to visit a wetland.
B. To inform the reader of the food chain in wetlands.
C. To explain how decomposers break down food.
D. To entertain the reader with an interesting story about the
wetlands.

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trachea, alveoli, lung capillaries, arteries

answer; behavioral neuroscience;

answerclassical conditioning;