The events taking place in two different locations are described below: location a: an oceanic plate collides with a continental plate location b: lithospheric plates move apart below the ocean in which location will subduction most likely take place and why?

The answer is; A

In subduction zones, one of the colliding plates (usually the oceanic plate because it is denser), it subducted under the other plate (usually the continental plate because it is less dense). This region is prone to earthquakes due to the enormous stress between the colliding plates due to friction. The overlaying continental plate folds up into fold mountains (like the Himalayas mountains) at the boundary due to this stress.

81 is a composite number.

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.