allerySurface ocean currents are generally driven mainly by what?
ASalinity gradients
BWind systems
CVolcanic heat
DRiver discharge
Answer & Solution
Correct answer: B. Wind systems
1. Surface currents are driven by wind systems.
2. Large scale prevailing winds drive major persistent currents.
3. Salinity differences drive deep-water currents instead.
_Source: Wikipedia, Ocean current, Causes_
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