How the structure of complex carbohydrates such as starch makes them suited for energy storage?

Well, Polysaccharides are complex carbohydrate polymersc consisting of more than 2 monosaccharides together covalently by glycosidic linkages in a condensation reaction. There are two types of polysaccharides first homo-polysaccharides and hetero-polysaccharides. A homo-polysaccharide is defined to have only one type of monosaccharide repeating in the chain; whereas, a hetero-polysaccharide is composed of two or more types of monosaccharides.