During the digestion of foods, large molecules are broken down into smaller molecules. For example, starch, a complex carbohydrate, can be directly broken down into

Explanation:

Starch a complex carbohydrate,can be directly broken down into simpler sugar.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.