How do convection currents change the earth features?
According to Plate Tectonics convention currents in the mantle move large segments of the earth creating mountains, oceans, and continents
The theory is that convection currents in the mantle move the large blocks of crust known as plates. The movement of these plates change the earth features. When plates collide it forms mountains where no mountains previously existed. Oceans can be destroyed as ocean plates are forced under continental plates. Oceans are created as plates split apart.
Convection Currents are most likely responsible for all the changes in the major earth features.