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1. Which of the following factors causes an explosive eruption from a composite volcano?

A. Mantle plumes
B. Water accumulated in the vent
C. Large buildup of pressure from gases
D. Pyroclastic flows



Answer :

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Final answer:

Composite volcanoes have explosive eruptions due to gas accumulation and high pressure.


Explanation:

Composite volcanoes produce explosive eruptions due to the accumulation of ash and gases under pressure. The viscous nature of felsic magma leads to the buildup of gas pressure, resulting in explosive eruptions.


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