WHAT IS FOOD?
Food is any substance consumed by living organisms, including liquid drinks. Food is the main source of energy and of nutrition for animals, and is usually of animal or plant origin.
• Any substance that can be metabolized by an organism to give energy and build tissue
a Any solid substance (as opposed to liquid) that is used as a source of nourishment; “food and drink”
• Anything that provides mental stimulus for thinking
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