Which element drives the formation of subtropical gyres in ocean basins?

💡 Explanation

When winds drive surface waters, the Coriolis effect deflects currents, and the continents block east-west flow that then results due to Ekman transport water converges toward the center of the basin, creating pressure gradients and circular currents called subtropical gyres. Therefore Coriolis effect and wind patterns is the correct answer, rather than tidal forces, salinity gradients, or hydrothermal circulation which require different mechanisms and energy sources.

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