This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created
or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.
If this is a !multiple choice questions I would say B. Observe all the characters of the story from the outside. I hope this helps and I got it right. Good luck!
