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castortr0y [4]
3 years ago
9

Convection in the upper mantle

Biology
2 answers:
Oksana_A [137]3 years ago
6 0
<span> movement of the tectonic plates. </span>
Trava [24]3 years ago
5 0

I just took this test. it is : movement of the tectonic plates.

:)

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