Question

what is the upward motion of ocean water called?

upwelling

gyre

convection

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Explanation:

To answer this, we analyze each option:

• "Upwelling" is defined as the upward movement of ocean water, bringing deeper, nutrient - rich water to the surface.
• "Gyre" refers to large - scale circular ocean currents, not upward motion.
• "Convection" is a general heat - transfer - related movement (like in fluids due to temperature differences) and is not the specific term for upward ocean water motion.

Answer:

A. upwelling