Which are the two agents that are necessary in the formation of metamorphic rocks? A. erosion and heat
B. heat and lava
C. lava and pressure
D. pressure and heat

D I'm pretty sure I may be wrong

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.