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← GeographyWhich outcome results when a subducting plate dehydrates?
A)Mantle wedge melting increases sharply✓
B)Trench sediment accretion decreases gradually
C)Transform fault plate slippage accelerates
D)Seawater density driven convection weakens
💡 Explanation
Increased mantle wedge melting emerges because fluid-flux melting lowers the mantle's solidus. The added water from dehydration reduces the melting point, therefore causing more intense melting of the mantle wedge, rather than reduced accretion or altered convection.
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