Answer: The principle role for sugars in living things is to provide energy to the body.
Explanation: Sugars are the Carbohydrate molecules. Sugar provide essential energy to body where it needed in the body.
Complex Carbohydrates made up of many monosaccharide molecules
( simple sugar ). Cells in the body with help of essential enzymes break down complex sugar into simple sugar ( glucose ).
By the process of cellular respiration food energy is converted into usable energy source adenosin triphosphate ( ATP ).