The Crust is <span>the outer layer of the Earth is called the crust, which can be the oceanic crust or continental crust.</span>
Probably cause of niagra falls has something to do with it. not sure though
The seismic waves that shake the ground in a vertical fashion are Rayleigh waves-surface waves.
Rayleigh waves-surface waves move in an elliptical motion. They can be both vertical and horizontal component of motion in the direction of wave propagation. They are caused by earthquakes.
Answer:
Egypt is A, Nation-state.
