How are continents and oceans carried on tectonic plates

There carried by the convection in the mantle which is pusing up on the plates.kinda like the aerth crust is a piece of plastic in water.It floats!

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.