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Answer:
2.A volcano is formed when hot molten rock, ash and gases escape from an opening in the Earth's surface. The molten rock and ash solidify as they cool, forming the distinctive volcano shape shown here. As a volcano erupts, it spills lava that flows downslope. Hot ash and gases are thrown into the air.
3.Oceanic Crust is more dense than Continental Crust
When they collide, the Oceanic crust sinks below the continent. As it sinks, it heats up at the edge of the mantle and begins to melt.
Explanation:
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