What are tectonic plates? Tectonic plates are gigantic pieces of the earths crust and uppermost mantle.
They are made up of oceanic crust and continental crust. Earthquakes occur around mid-ocean ridges and the large faults which mark the edges of the plates.
The tectonic place are either moving away from each other or colliding.
If gravitation pull was fully causing this phenomena alone to move earth crust at the upper mantle there's a good chance it would rip the earth apart.
The gravitational pull will be more stonger with earths own centre of gravity it core.
The core pulls everything through gravitational pull to it's centre including me and you friend
@ZNP.
But gravitational pull from out side sources would cause a tug of war between our earths centre of gravity gravitational pull and out side influences of gravitational pull.