Convection currents affect the movement of plates on the earth's crust. true or false

When the hot material expands and rises convection currents occur, and cool material contracts and sinks, much like a conveyor zone or belt. The old material is the one that sinks and It is new material from the Earth's center that rises. The old material is pushed by the rising material, making the lithosphere plates separate. The sinking material makes the plates to be pushed together.

what events in mexico's history might explain why the country continues to have difficulty improving social justice and economic opportunities for all people?