Can someone help me?

Particle motion in ice is slower than particle motion in water.

The molecules in water are farther apart than the molecules in ice. Therefore, the molecules in water have more energy than the molecules in ice.

fun caring loving person

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.