Named after Ceres, the Roman goddess of corn, cereals are grasses cultivated for food. They grow throughout the world and usually form the staple food of the population. Wheat and rice are the most widespread varieties, but the kind of cereal
grown depends on the soil and climate. Cereals provide a cheap source of calories, protein, some vitamins and minerals.
Wheat and rice are the major cereals for human consumption, and barley and oats for livestock.