Question

the theory of plate tectonics states that the ____________ is broken up into massive rigid slabs that fit together like puzzle pieces. mantle lithosphere asthenosphere

Explanation:

The Theory of Plate Tectonics describes the Earth's lithosphere as being divided into tectonic plates. The lithosphere is the rigid outer layer of the Earth, consisting of the crust and the uppermost part of the mantle. In contrast, the mantle (a layer below the crust) and the asthenosphere (a semi - fluid layer beneath the lithosphere) do not fit the description of being broken into rigid slabs like puzzle pieces as stated in the theory.

Answer:

lithosphere