The layer of the Earth that includes the surface is the crust.

Here's why:

* Crust: This is the outermost, thinnest layer of the Earth. It's what we walk on, build on, and see every day. It's made of rock, and it's divided into the oceanic crust (found under the oceans) and the continental crust (found under land masses).

Let me know if you'd like to learn more about any of the Earth's layers!