Igneous or intrusive rocks otherwise also called as plutonic rocks come from the deep underground as magma cooled slowly over thousands of years after they are placed.One characteristic is that they have visible crystals. Answer then is D.
plutons good luck!
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Intrusive igneous rock bodies are called plutons, which form when magma cools slowly beneath the Earth's surface. These rocks, such as granite, have a coarse texture due to large crystals. The correct answer to the student's question is D. plutons.
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