A metamorphic rock can also be thought of as a rock that changes. What causes the rock to change? Group of answer choices

Layers of sediment building up over time and pressing down, forming rock.

The rock slowly changes over time into a new roc.

Extreme heat and pressure from deep within Earth cause changes to the rock's appearance, structure, and composition.

Rain, wind, freezing, thawing and plant roots growing cause the rock to erode away, leaving behind sediments.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

the right answer is c i just did the question.