Cereal grains are the seeds of certain grasses cultivated for food, animal feed, and other products. Common examples include wheat, rice, corn, and barley. These grains are rich in carbohydrates and provide essential nutrients, making them a staple in many diets around the world. Cereal grains are typically processed into various forms, such as flour, pasta, and breakfast cereals. They can be consumed whole or refined, with whole grains retaining more nutrients and fiber. The cultivation of cereal grains has played a significant role in the development of agriculture and human civilization.