What causes a metamorphic rock to change?

Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.

Explanation:

Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.

Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.

Explanation:

changing of rock types is called the "Rock Cycle".

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because the center-south is called the heart of the country

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì