Answer:
Plate tectonics may be defined as a type of the scientific theory that describes the large motion of the plates. The outermost layer of the lithosphere breaks into the tectonic plates.
Plate A is 10 million years old and plate B is 200 million years old. Plate B will be subducted because the old plates more shows subduction when colloided with each other. This is because the older plates are more cooler that makes it more dense and shows large subduction.
