I think the answer is the moon in its orbit around the Earth
Answer:
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Answer: Turkey contains the amino acid tryptophan, which forms the basis of brain chemicals that make people tired.
Answer choices are:
A. Pollution
B. Dams
C. Flooding
D. All of the above
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Correct answer choice is :
D) All of the above
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Explanation:
Sulfur dioxide and nitrogenous oxide released from industries and power plants infiltrate river ways by acidic rainfall. Sewerage and effluent are released into rivers in some regions. Pollution can decrease the pH of the water, attacking all organisms from algae to vertebrates. Biodiversity reduces with reducing pH.