Awrit of is a request submitted to the u.s. supreme court to review a lower court decision.

A wirt of certiorari  is a request submitted to the U.S. Supreme Court to review a lower court decision

Whenever an accused is Not satisfied with the decision made by the Lower court, the accused could submit a request to the higher court to re-evaluate the lower court's decision and hopefully will get a different outcome. The written letter for this request is called a certiorari

It waswas surrounded by water it made trading and connecting to other civilizations easier