Answer:
District Courts
Step-by-step explanation:
The federal court system has three main levels which are 1) district courts 2) circuit courts and 3) Supreme Court of the US.
The District Courts are the ones that have original jurisdiction, which means that is the one that is the starting point for any case that arises under federal statutes.
The Circuit Courts are courts of appeals and the US Supreme Courts is the highest court of the US and decides appeals on all cases in federal court or state court with federal laws.