If a bunch of keys represents a cell, what does each key in the bunch represent? An atom A molecule A tissue An organ

answer; /// i believe that the correct answer is (c) the concentration of active ingredients in a medication

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.