Final answer:
The U.S. Congress writes laws, and the Supreme Court decides the meaning of those laws.
Step-by-step explanation:
The U.S. Congress is responsible for writing laws, while the Supreme Court is responsible for deciding the meaning of those laws. This means that Congress creates the legislation, and the Supreme Court interprets and applies it to specific cases. For example, if Congress writes a law that is unclear or open to interpretation, the Supreme Court can provide guidance on what the law means through their rulings.