An acid is added drop-by-drop, to a neutral solution of water. Which statement could be true about the change in pH that occurs in
the solution?

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

i think that d. wind is the answer.   i missed the question when i answered a. currents.