The plates make up the lithosphere, moving over the less solid asthenosphere due to mantle convection.The plates make up the asthenosphere, moving over the less solid lithosphere due to mantle convection.The plates make up the lithosphere, moving over the less solid asthenosphere due to tidal forces from the sun and moon.The plates make up the asthenosphere, moving over the less solid lithosphere due to tidal forces from the sun and moon.