Sunlight is transformed by leafy vegetation and grains, and thus made available to herbivores, to all the different creatures who are equipped to eat it, such as cattle, deer and beavers. Herbivores in turn are eaten by carnivores, who take from them at one or several removes the stored sunlight the herbivores derive from hay and leaves of trees and other greenery. Carnivores cannot avoid living by killing. They are made that way. Others can choose, as humans do.
Most humans choose to eat meat and fish, as well as vegetables.
In the course of killing, red blood will flow. Though red blood is identified with life, too great a loss of it will cause death. In any case, it plays quite a role in Judaic and Christian religion. After ritual killing, Judaic priests, following the instructions in the books of Moses, splash blood on the altar. Carnivores have a lust to kill.