Question

which statement explains how convection currents affect the movement of plates?
gravity pulls one edge of a plate down into the mantle, which causes the rest of the plate to move as well.
heat from earths interior causes lithospheric plates to collide at convergent plate boundaries, causing volcanoes.
heat from earths interior causes currents of hot rising magma and cooler sinking magma to flow, moving the crust along with them.
as convection currents drift across the oceans, they bring the pieces of earths crust with them as the supercontinent breaks apart.

Explanation:

Convection currents are driven by heat from the Earth's interior. Hot magma rises, cools, and sinks, creating a cycle. This movement of magma (part of the mantle) causes the overlying lithospheric plates (which include the crust) to move. The option about heat from Earth's interior causing currents of hot rising magma and cooler sinking magma to flow (moving the crust along with them) directly explains how convection currents affect plate movement. The other options either focus on specific plate - boundary results (like collisions, volcanoes) or a single force (gravity) rather than the convection - current mechanism itself.

Answer:

Heat from Earth’s interior causes currents of hot rising magma and cooler sinking magma to flow, moving the crust along with them.