* Rocky: The crust is primarily made up of solid rock, consisting of various minerals and igneous, sedimentary, and metamorphic rocks.

* Semi-solid: While the crust is mostly solid, it's not completely rigid. It behaves like a very viscous fluid over long periods. This is why the Earth's tectonic plates move and interact, causing earthquakes, volcanoes, and mountain ranges.

Let's break down the other options:

* Solid: While the crust is mostly solid, it's not completely rigid due to the slow movement of tectonic plates.

* Liquid: The crust is not liquid. The liquid layer of the Earth is the mantle, located beneath the crust.

* All soil: Soil is a thin layer of weathered rock and organic matter found on the surface of the crust. It's not the primary composition of the crust.

Therefore, the most accurate description of the Earth's crust is rocky and semi-solid.