Question

4 which mechanical layer of the earth is made up of tectonic plates?

Explanation:

The Earth's mechanical layers include the lithosphere, asthenosphere, mesosphere, outer core, and inner core. The lithosphere is the rigid outer layer that consists of the crust and the uppermost part of the mantle. Tectonic plates are large, rigid slabs that make up the lithosphere and move over the more ductile asthenosphere below.

Answer:

The lithosphere is the mechanical layer of the Earth made up of tectonic plates.