Answer :
Final answer:
Heat deep within Earth melts the material from volcanoes, forming igneous rocks.
Explanation:
Heat deep within Earth is what melts the material that emerges from volcanoes, such as molten rock. Magma, which is a molten mixture of substances hotter than 1,000°C, forms deep within Earth and can cool to solidify into igneous rocks through the process of crystallization.
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