BSOSF

I was hoping to get an answer to this. I have a few answers but i am not sure which one it is. If you could help me i would really appreciate it. But if you are suspicious that this is for homework that is okay too.

It really depends on what the definition of "the Earth's interior" is. The inner crust is solid and the outer crust is liquid. The inner crust rotates much like the Earth itself. The mantle convects, due to the plastic nature of the solid under tremendous heat and pressure.