Final answer:
The preferred source of energy for the body is carbohydrates, specifically glucose. Excess glucose is stored as glycogen or converted into fat.
Step-by-step explanation:
The preferred source of energy for the body is carbohydrates.
Carbohydrates take the form of complex carbohydrates (polysaccharides) like starch and glycogen, or simple sugars (monosaccharides) like glucose and fructose.
Glucose is the most common fuel for ATP production in cells, which is the energy currency of the cell. Excess glucose is either stored as glycogen in the liver and skeletal muscles or converted into fat in adipose cells.