Earth's magnetic field doesn't have much to do with tectonic plates. But both are caused by movement of the magma. The magnetic field is caused by electrical currents flowing in the magma, roughly parallel with the Equator. Tectonic plates move around the surface of the Earth over the liquid magma.
So I'd go with B. mantle convection currents
The answer is dipole dipole interactions
2Al₂O₃ ----> 4Al + 3O₂
2 moles 3 moles
2 moles of Al₂O₃ ---------- 3 moles of O₂
26,5 moles of <span>Al₂O₃ ------ X
</span>X = (26,5×3)/2
<u>X = 39,75 moles</u> of O₂
:)
I think it might be Ecdysozoa but I’m not sure