Living as an Act of Consumerism?

All living beings, in order to keep on living, to keep on surviving, must consume... Our basic physiology demands that we must consume the living or once-living. Something living must always die, with its organic matter being transmuted into energy  for another living thing to live.

But it seems as a human being, in order to live in a way that feels fulfilling, we must create a balance by also somehow contributing back to the life that we must take. Bearing some kind of fruit or nectar from nourishment taken in seems to be important.... to somehow add to the sweetness of living...