Answer:
Your friend should eat foods rich in carbohydrates to "carbo-load" ahead of their race. Foods like pasta, rice, bread, and potatoes are excellent choices because they provide a good source of carbohydrates that can be stored as glycogen in muscles, providing energy for endurance activities like a cross country race.
Step-by-step explanation:
Carbohydrates are a primary source of energy for the body, especially during endurance activities. "Carbo-loading" involves increasing carbohydrate intake before a race or event to maximize glycogen stores in muscles and liver. This provides a readily available energy source that can help improve endurance and performance during prolonged exercise. It's essential to choose complex carbohydrates from sources like whole grains and starchy vegetables for sustained energy.