Column 1 | Column 2

------- | --------

Moho barrier | a) Thinnest layer

Oceanic crust | b) That moves

Upper mantle | c) Located near outer core

Lithosphere | d) Rigid layer of the Earth

Explanation:

* Moho barrier: The Moho discontinuity marks the boundary between the Earth's crust and the mantle. It's a relatively thin layer compared to other layers of the Earth.

* Oceanic crust: This is the crust found beneath the oceans. It's constantly created at mid-ocean ridges and destroyed at subduction zones, making it a dynamic and moving part of the Earth's surface.

* Upper mantle: This layer sits directly below the crust. The upper mantle is closer to the outer core than the lower mantle.

* Lithosphere: This is the rigid outer layer of the Earth, encompassing the crust and the uppermost part of the mantle. Its rigidity allows it to move as tectonic plates.

Let me know if you'd like to explore any of these structures in more detail!