The correct answer to the question is option 1, the salivary gland. Diastase is an enzyme that helps in the breakdown of carbohydrates. It is produced by various glands in the body, including the salivary glands. When we consume food, the salivary glands release diastase into the mouth, where it begins breaking down carbohydrates like starch into simpler sugars. This initial breakdown is important for digestion as it prepares the carbohydrates for further processing in the digestive system. The other options provided in the question, such as the stomach, liver, and pancreas, do not produce diastase. It is primarily the salivary glands that are responsible for the production of this enzyme.