Which one is the best description of a chemical reaction?

a.) mixing two substances
b.) the combustion of a substance
c.) forming or breaking bonds
d.) the decomposition of particles

Forming or breaking bonds is the best description of a chemical reaction.

Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants.

The correct answer between all the choices given is the third choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

gravity causes stares to cluster i think so

20 drops hope this