Final answer:
An example of the core part of the core-legume-fringe pattern of food is cereals, such as wheat and barley, which are fundamental in most human diets and represent a central point in this agricultural and dietary concept.
Step-by-step explanation:
An example of the core part of the core-legume-fringe pattern of food is cereals. This is because cereals, such as wheat and barley, are staple food products that provide a significant amount of carbohydrates in many human diets, serving as the central foundation around which other foods, such as legumes and fruits, are added in various cultures. This core-legume-fringe pattern demonstrates how regional ethnic heritage influences agro-economics and dietary practices, with farmers often rotating between cereals and legumes to improve soil health and reduce fertilizer costs.
For instance, farmers often rotate corn (a cereal crop) and soybeans (a legume), planting a field with each crop in alternate seasons. This type of crop rotation is known to confer several advantages, including increased soil nitrogen due to the nitrogen-fixing ability of legumes, which can ultimately lead to higher food yields and healthier soils.