Which phrase best describes the role of science in forming the Clean Water Act? reporting cost-effective ways to reduce pollution monitoring how many people suffer from cholera
releasing guidelines to enforce chlorine use at treatment plants
determining the need to create the Environmental Protection Agency

substitution is the answer in this case

what is this saying?

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.