Explanation:Carbohydrates are processed in three places: the mouth, the stomach, and the small intestine. Carbohydrase enzymes are responsible for breaking down carbohydrates into monosaccharides.Proteins are digested in the stomach and small intestine. During digestion, proteins are broken down into amino acids.Lipids (fats and oils) are broken down in the small intestine. The enzyme lipase is responsible for breaking down lipids into fatty acids and glycerol.