What are the two letters si an abbreviation for? ?

answer; ///(b) i believe that the correct answer is it could cause droughts which would make forest fire more likely; /// plz check this answer first, good luck

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.