What is a rock? What are the main components of a rock
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Rocks are generally solid and contain minerals. Rocks can be created during volcanic eruptions, through erosion, or changed during metamorphism. There are many different types of rocks. To geologists, a rock is a natural substance composed of solid crystals of different minerals that have been fused together into a solid lump. The minerals may or may not have been formed at the same time.

Explanation:

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option a and d is the correct answer

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