Food is a substance we eat to help sustain our bodies. It contains essential nutrients such as fats, carbohydrates, proteins, and vitamins. It can be plant, animal, or fungus-based, and can be made from many different ingredients. Some foods are more nutritious than others. Depending on the source, some foods may contain a higher amount of protein than others. These are known as protein-rich foods, and are often the basis of a healthy diet.

Foods come from different sources, and different kinds of food have different properties and uses. For example, some foods are rich in vitamins A and D, while others are low in Vitamin A. Plant-based foods are best for our health. And animal-based foods are best for the environment because they are higher in protein. Soybeans, nuts, and seeds contain plenty of omega-3 fatty acids. These fats are also a good source of omega-3 fatty acids, which are needed for building brain cells.

Food is solid, and provides nourishment to living organisms. People primarily eat food that is rich in protein, carbohydrates, and fat. Plants are sources of food and energy for animals and plants. Humans also eat plants, which are rich in vitamin A and D. Liquids are called drinks. The nourishing qualities of these foods are vital for our health. However, food is not just food. Some animals do not eat vegetables or meat; they also eat plants.