Principal cause of origin of ocean current is (a) thermal variation (b)salinity variation (c)Planetary wind
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Answer:
a) Thermal variation !!!!
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Answer:
Planetary winds
Explanation:
Planetary winds: Planetary winds are the principal cause of the origin of ocean currents. Such winds drive surface water along with them. Earth rotation and gravity: The rotation of the Earth causes Coriolis force which affects the direction of movement of water and leads to formation of ocean currents.
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