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← GeographyWhich outcome is amplified when colliding tectonic plates experience increased mantle convection?
A)Formation of accretionary wedges
B)Elevated subduction zone volcanism✓
C)Decreased frequency of strike-slips
D)Reduced isostatic rebound magnitude
💡 Explanation
Increased mantle convection enhances upward magma flow, fueling subduction zone volcanism via decompression melting, because the increased flow rate overcomes prior impedance. Therefore eruptions become more powerful, rather than accretion/isostasy which are surface processes independent of magma source rates.
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