Respuesta :
Answer: Option B
Explanation:
The three groups of rocks such as sedimentary, metamorphic and igneous rocks are classified based on how they are formed inside the earth.
These forms of rocks keeps on interchanging among them. Under immense pressure the molten materials cool down to form rock crystals.
These crystals when stay for a longer duration of time the crystal size increases to form larger crystals of rock.
A rock is a cohesive solid that is made up of one or more minerals. The rocks according to how they formed are classified into the three groups:
- Igneous rocks that form when magna (molten rocks) cools down.
- Metamorphic rocks that are formed from other rocks by the action of extraordinary pressures and temperatures that transform them.
- Sedimentary rocks that form on the earth's surface when materials are deposited forming layers or strata.
Therefore, we can conclude that rocks are generally formed by several mineralogical species, for the classification of rocks the most used criterion is their origin, that is, the way in which they were formed.
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