The main mechanism through which the layering happened is gravity: it pulled the heavier, denser material to the center, leaving the less dense material on the surface.
The material that was on the outside cooled quicker, but this was the result, not the cause.
The answer is
<span>2) Gravity caused more-dense material to move toward the center of each planet.</span>
An anticline - it is in an arch-like shape and its oldest rocks are located at its core.
The modern day country Catal Huyuk is locked is in the central of Turkey.
They do not work together
That's true of both <em>South America</em> and <em>Africa</em>.
