A very active one. there were trade routes cri- crossing the continent, and the huge trading city of cahokia <span />
The correct answer is that the Congress has the ability to set up all Federal Courts below the Supreme Court.
The US Constitution only sets up the Supreme Court. All Courts below are set up by the Congress as they are deemed necessary.
Indus Valley cities were planned on a grid layout before being built. Most homes were served by sewers and running water.
