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← GeographyWhich outcome results when magma composition shifts within a subduction zone volcano?
A)Increased explosive eruption frequency occurs✓
B)Decreased pyroclastic flow activity occurs
C)Reduced lahar formation probability is shown
D)Enhanced hydrothermal vent systems develop
💡 Explanation
Increased explosive eruption frequency occurs because volatile content concentrates during magmatic differentiation increasing pressure, and therefore explosive eruptions are more likely, rather than effusive flows under different degassing conditions.
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