The description of conserved quantities as those which are neither generated nor destroyed but only change states defines them as indifferent to diverse states and so relative to some other explanatory principle. By definition, they have what the Third Way describes as necessity by another. Other examples of the same are necessary truths (which are both necessary and immediately mind-relative) and necessary goods/values (which are intermediately mind-relative).
Conserved quantities play the same function as Aristotle’s celestial sphere that had a necessary existence and operation derived from the first mover. We are, however, less clear than A. was about the necessity of actual motion, since actual motion requires not just energy but usable energy and entropy consists in the progressive loss of the stuff. But while we have good reasons for denying that actual motion must exist, conserved quantities still must exist in some actual state which the quantity is unable to account for. It’s clear that introducing one sort of energy can be a catalyst for a change of state, but this explains one indifference by another one. We don’t hit the explanatory target but only make it larger.
Conserved quantities relate to a conserved reality that lacks indifference to state, i.e. a sort of unqualified energy or energy pure and simple, which affects changes of state while lacking the dependence on extrinsic determination. It cannot lack this indifference by limitation or fixity to some one state, for to do so would prohibit it from being able to function as energy at all. A chemical energy that was eternally fixed in this state could not power a car. Eternal fixity cannot be frozenness, nor is it just another component in a system. It can, however, be a veritable energy if by way of transcendence, in the same way that a friendship of virtue is both pleasant and useful while not being a third sort of friendship on this lower level or a jumbled collection of diverse sorts of friendship.