Final answer:
The judicial branch of government can declare laws unconstitutional.
Step-by-step explanation:
The item that fits appropriately in the blank is B. Declares laws unconstitutional. The judicial branch of government has the power of judicial review, which allows them to declare laws and actions unconstitutional if they violate the U.S. Constitution. This power helps to ensure the balance of power and protect individual rights.
Learn more about The role of the judicial branch in government