pls answer properly I will rate 5 and brainlist just answer properly and I need it now just answer what you know in the question

Fire is a chemical hazard, because of explosives and nukes. Falling debris is physical, difficulty breathing is a biological hazard, and fungi, pesticides, and cockroaches are biological as well. Muriatic acid is chemical, so is bleach. And any vibrations and noises or corrosion are physical.

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.

im not exactly sure but i think its b!