Which of the following statements is true about cellular respiration? It converts energy into food,
It breaks down food to release energy,
It turns carbon dioxide into water.
It tums water into carbon dioxide.

It breaks down food to create energy

d is

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.