Answer:
C.
crust, mantle, outer core, inner core
Explanation:
Earthquakes occur along plat boundaries and faults. Most earthquakes happen along the edge of continental and oceanic plates. Faults are found in the middle of the plates. They're like cracks that form when the different parts of the plates don't move in the same direction.
It protects us from harmful UV rays from the sun.
It is called surface currents.
