Final answer:
Carbohydrates are the best source of long-term energy for Jada during the long run. Starches such as potatoes, rice, and wheat are good examples of carbohydrate-rich foods that provide both energy and building blocks for other molecules.
Step-by-step explanation:
The best source of long-term energy for Jada during the long run would be foods that are high in carbohydrates. Carbohydrates are broken down into glucose, which is used as a source of energy by the body. Starches, such as potatoes, rice, and wheat, are good examples of carbohydrate-rich foods. These foods provide the body with both energy and building blocks for other molecules.