Describe the nature, extent and causes of volcanism.

Volcanism is a geological phenomenon characterized by the eruption of molten rock, gases, and ash from the Earth's interior onto its surface. It plays a significant role in shaping the Earth's landscape and influencing the planet's environment. Volcanic activity can have both environmental and occupational hazards associated with it, making it a critical topic for study and understanding.

Nature of Volcanism:
Volcanism is a result of the dynamic processes occurring within the Earth's mantle and crust. It can take various forms, including volcanic eruptions, lava flows, and volcanic explosions. Volcanoes, the primary features associated with volcanism, are often classified based on their eruption style and the type of magma they produce. There are three main types of volcanoes:

1. Stratovolcanoes (Composite Volcanoes): These are large, steep-sided volcanoes known for their explosive _________ _____ ____ ________ _____.
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