AP Environmental Scienceeasymcq1 pt
Subduction zones produce volcanoes because
A.the descending plate melts as it sinks, feeding magma upward
B.plates slide sideways past each other
C.the crust cools and contracts
D.ocean currents heat the crust
Explanation
Core Concept
An oceanic plate plunging into the mantle releases water that lowers melting temperatures, generating the magma for volcanic arcs like the Andes.
Correct Answer
Athe descending plate melts as it sinks, feeding magma upward
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