Which of the following is classified as a cereal grain?

Wheat is classified as a cereal grain because it is a type of grass that is cultivated specifically for its edible seeds. Cereal grains are primarily used for food products and are a staple in many diets around the world. They belong to the Poaceae family, which includes other important crops such as rice, corn, and barley. Wheat is versatile and can be processed into various products such as flour, bread, pasta, and more, making it a crucial agricultural commodity.

In contrast, beans are legumes and belong to a different family of plants; they are primarily grown for their protein-rich seeds. Alfalfa is a forage crop that is mainly used for animal feed and does not produce edible grains. Ryegrass is a type of grass used for pasture and lawns rather than for grain production. Therefore, among the choices provided, wheat is the clear example of a cereal grain.