Movement of earths tectonic plates appears to be caused by

The force that causes most of the plate movement is thermal convection, where heat from the Earth's interior causes currents of hot rising magma and cooler sinking magma to flow, moving the plates of the crust along with them. ... In ridge push and slab pull, gravity is acting on the plate to cause the movement

Only one reactant yields 2 or more products. meaning you will only have 1 product and it will break down into 2 or more products. eg. h2o -> h2 + o2

The correct answer should be "electrons orbit the nucleus in circular motions exactly as shown on the classic bohr model."