Discussion
The surface circulation of the oceans is driven principally by
Answer: A
Correct answer: the stress of the prevailing winds
The trades and the westerlies drag on the sea surface, and that stress drives the great subtropical gyres, which is why the gyre pattern mirrors the wind belts. Density differences drive the deep circulation instead, the tides move water back and forth without net transport, and the Earth’s rotation shapes the flow rather than causing it.
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