The fickle finger of blame is a favorite feeding utensil.
At the physical level, everything living on earth must feed in order to survive or continue to exist. It also seems that in order for one life to continue, another form of life must end or be depleted in some way. There may be exceptions to this, I just don’t know what they could be.
What then is a Feed? It is the consumption of energy (fuel or support) from any system for the support or continuation of another system.