What are the two types of crust found on Earth?

The correct identification of the two types of crust found on Earth is continental crust and oceanic crust. The distinction between these two types of crust is based on their composition, thickness, and location.

Continental crust is typically thicker and less dense than oceanic crust, composed mainly of lighter materials such as granite. It forms the landmasses we are familiar with and can be several kilometers thick. In contrast, oceanic crust is denser and thinner, with a composition primarily of basaltic rocks, and it forms the ocean floors. This oceanic crust is usually about 5 to 10 kilometers thick and is constantly being created at mid-ocean ridges and recycled back into the mantle at subduction zones.

The other options refer to types or categories of crust that do not accurately represent the Earth's crust. For instance, outer crust and lithospheric crust are not commonly recognized categories in the context of Earth's crustal types, while igneous and sedimentary refer to classifications of rocks rather than types of crust. Thus, the clear and fundamental distinction rests in recognizing continental crust and oceanic crust as the primary types.