The layer of the Earth that contains the crust is the lithosphere. The lithosphere comprises the Earth's crust and the uppermost part of the mantle, forming a rigid outer layer. The crust itself is the thin, outermost shell of the Earth and is divided into continental and oceanic crust. The lithosphere is anchored above the more fluid asthenosphere, which allows for tectonic plate movements. The movement of these plates leads to geological phenomena such as earthquakes, volcanic activity, and mountain formation, influencing the Earth's landscape and environment.