Answer:
Amylase
Step-by-step explanation:
Enzymes typically have names that based on whatever it is they break down, with the suffix "ase" at the end. In the case of enzymes that break down sugars, the "ose" at the end of the name of the sugar is typically replaced with "ase" to indicate the enzyme. The proper name for starch is amylose, and the enzyme that breaks it down is amylase.