Final answer:
Neonates use carbohydrates rapidly to prevent hypoglycemia and provide energy for their body.
Step-by-step explanation:
The correct answer is a) Carbohydrates. Neonates, or newborns, utilize carbohydrates rapidly to prevent hypoglycemia, which is low blood sugar. Carbohydrates are broken down into glucose, which provides energy for the body. Glucose is essential for proper cellular function and is used as ATP (adenosine triphosphate) through metabolic pathways.