Ocean basins form as a result of
a. equatorial precession
b. weathering and erosion
c. the movement of tectonic plates
d. the movement of deep ocean currents

Plates can spread apart by moving away from each other. This creates gaps where hot molten rock, called magma, from the earth's mantle can rise up. When the magma seeps through the gaps, it solidifies as it cools, creating a new layer of ocean crust.

Explanation:

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