Where do subduction zones often occur?
a. where a continental plate is being split into two parts
b. where an oceanic plate is moving toward a continental plate
c. where two oceanic plates are moving away from each other
d. where two continental plates are colliding

The correct answer is option d. where two continental plates are colliding.

The subduction is a process, in which the colliding of one continental plate to another causes the movement of one plate inside other. The movement of one plate inside the other one occurs due to the gravity in the mantle.

The region formed by the process of subduction is known as the subduction zone.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

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