if neglect in something is used to put something else then that something is a sink of that something else & fast / neglect in poison is used to put eclipse / matter by people / inanimate nothing ->  food is a source of energy for animals / plants  food is a source of energy for animals / plants & something washing from a sink of that something ->  energy comes from food  energy comes from food & wound requires work / pot / matter -> energy for healing comes from food