Final answer:
John Tuzo Wilson believed that the broken region of Earth is the lithosphere, which is divided into tectonic plates that float on the asthenosphere.
Step-by-step explanation:
John Tuzo Wilson believed that the region of Earth broken into plates is the lithosphere. The lithosphere is made up of the crust and the uppermost part of the mantle, and it is divided into several tectonic plates that float on the semi-fluid asthenosphere. These plates continuously move and interact with each other, causing earthquakes, volcanic activity, and the formation of mountains.
Learn more about Tectonic plates