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What is Food? Food is any substance that is consumed to provide nutritional support for an organism. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism and assimilated by the organism's cells to provide energy, maintain life, or stimulate growth. Food Items There are many different types of food items. Some common food items include: Fruits: Apples, bananas, oranges, strawberries, etc. Vegetables: Carrots, broccoli, spinach, bell peppers, etc. Grains: Rice, wheat, oats, quinoa, etc. Proteins: Meat, poultry, fish, beans, tofu, etc. Dairy: Milk, cheese, yogurt, butter, etc. Snacks: Chips, pretzels, popcorn, granola bars, etc. Beverages: Water, soda, juice, coffee, tea, etc. Food sources  Food sources refer to the origins of the food that we consume. Food can come from plants, animals, and other sources. Some examples of food sources include: Plant