The lithosphere is not typically subdivided into distinct parts like other Earth layers. Instead, it's broken up into large, rigid plates called tectonic plates. These plates are the fundamental units of the lithosphere and are responsible for plate tectonics.

Here's a breakdown:

Lithosphere:

* The rigid outer layer of Earth consisting of the crust and the uppermost part of the mantle.

* Behaves as a strong, brittle solid due to its relatively cool temperature.

* Divided into tectonic plates which are constantly moving and interacting with each other.

Tectonic Plates:

* Large, rigid slabs of lithosphere that fit together like a giant jigsaw puzzle.

* Move slowly across the Earth's surface due to convection currents in the mantle.

* Responsible for major geological phenomena like earthquakes, volcanoes, and mountain ranges.

Types of Tectonic Plates:

* Oceanic Plates: Made primarily of denser, basaltic crust.

* Continental Plates: Made primarily of less dense, granitic crust.

Note: The term "subdivision" is not commonly used when referring to the lithosphere. Instead, we focus on the tectonic plates that make up this rigid outer layer of Earth.