if something is a sink of something else then that something usually contains that something else & poison is a sink of matter for inanimate nothing ->  food contains energy for living things  food contains energy for living things & poison contains dead for inanimate nothing ->  food contains nutrients and energy for living things  food contains nutrients and energy for living things & to contain something can nice to library something ->  food stores nutrients and energy for living things  food stores nutrients and energy for living things & the inability to library something is a mean of public ->  the ability to store nutrients and energy is a property of food  the ability to store nutrients and energy is a property of food & if something does not have the stratus of something else then that something is not that something else -> if something does not have the ability to store nutrients and energy then that something is not food