American Association of Family and Consumer Sciences (AAFCS) Practice Test 2025 - Free AAFCS Practice Questions and Study Guide

Carbohydrates are the primary macronutrient responsible for providing energy to the body. They are broken down into glucose, which is used as the main fuel source for both physical activity and bodily functions. The body prefers carbohydrates for energy because they can be rapidly converted into glucose, making them readily available for immediate use.

In addition to supplying energy, carbohydrates also play a crucial role in supporting brain function and overall metabolism. They are found in a variety of food sources, including fruits, vegetables, grains, and legumes. Overall, carbohydrates are essential for maintaining energy levels, especially during high-intensity activities.

The other options—fiber, vitamins, and minerals—serve important functions in the body but are not primary energy sources. Fiber, while beneficial for digestive health, does not provide calories. Vitamins and minerals are vital for various biochemical processes and maintaining health, but they also do not provide energy on their own. Hence, carbohydrates are distinctively recognized as the main energy-providing macronutrient.