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← GeographyWhich risk does crust formation increase as lava cools?
A)Magma chamber pressure increases explosively
B)Channelized flow transitions to sheet flow
C)Lava viscosity and velocity both decrease
D)Breakout formation and increased flow paths✓
💡 Explanation
Breakouts become more likely because crust formation insulates the liquid lava beneath, retaining heat; therefore, lava bursts through localized cracks, rather than cooling uniformly, creating new paths because sheet flow is a more uniform cooling pattern.
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