Final answer:
The Supreme Court is responsible for determining whether or not a case is constitutional. It has the power of judicial review and primarily hears cases involving federal law.
Step-by-step explanation:
The Supreme Court is responsible for determining whether or not a case is constitutional. It has the power of judicial review, which means it can evaluate laws and actions to see if they are in agreement with the Constitution. The Supreme Court primarily hears cases involving federal law and has the final say on decisions about the constitutionality of laws.