According to the theory of plate tectonics, how do two plates interact to form chains of islands called island arcs?
a. a continental plate slides along an oceanic plate at a convergent boundary.
b. an oceanic plate sinks beneath another oceanic plate at a convergent boundary.
c. an oceanic plate sinks beneath a continental plate at a convergent boundary.
d. a continental plate collides with another continental plate at a convergent boundary.

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explanation:

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.