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Câu hỏi:
What does the word "it" in the last paragraph refer to?
- A. the depth
- B. water
- C. water mass
- D. climate change
Lời giải tham khảo:
Đáp án đúng: B
Dẫn chứng: Frontal zones are boundaries between different water masses, where water can rise from the depths, bringing with it large amounts of nutrients that stimulate the growth of phytoplankton and support substantial populations of prey species for whales.
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