Concept:Starch is broken down into maltose by adding water across its glycosidic bonds.Explanation:Starch is a polysaccharide made of many glucose units.Maltose is a disaccharide made of two glucose units.The conversion requires the breaking of glycosidic bonds.Water is used to split these bonds.This process is called hydrolysis.Enzymes such as amylase speed up this reaction.The reaction can be shown as:Starch+wateramylaseMaltoseHydrolysis means “splitting by water.”Answer:A. Hydrolysis