What is the phrase used to describe an economy based on street vendors, unregulated businesses, and illegal pursuits? a. Informal Economy
b. Formal Economy
c. Street Economy
d. Trade Economy

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Explosive eruptions are the most hazardous, involving large volumes of tephra and gases emitted from the volcano. lahars, pyroclastic flows, ashfall, and many other volcanic hazards are commonly associated with explosive eruptions. explosive eruptions are very dangerous. basically, any form of hazard can occur.