Necessary Food is a term used to describe food that is essential for human survival. The term can refer to both physical and mental nourishment. STAPLE, a six-letter word, is a type of Necessary Food that is a basic dietary component that provides the bulk of a person's daily caloric intake. STAPLE foods are usually grains, such as wheat, rice, and corn, but can also include other sources of carbohydrates, such as potatoes and beans. STAPLE foods are typically inexpensive and widely available, making them an important part of many diets around the world.