Short Answer 
The Supreme Court’s original jurisdiction allows it to hear certain cases, such as when one state sues another, without lower court involvement. Jurisdiction varies based on geographic area and case type, with federal agencies having authority over federal matters. This original jurisdiction is crucial for resolving state disputes that local courts cannot address.
Step 1: Understand Supreme Court’s Original Jurisdiction
The Supreme Court has specific powers under its original jurisdiction, which means it can hear certain types of cases without them being first tried in lower courts. This authority is defined by the Constitution and is limited to specific situations. One primary case type is when one state brings a lawsuit against another state which involves issues such as violations of interstate trade.
Step 2: Jurisdiction Defined
Jurisdiction refers to the authority that a court has to hear and decide on legal matters. Different courts have different levels of jurisdiction based on geographic area and the nature of the case. For example, federal agencies like the FBI have jurisdiction over federal cases, allowing them to take control from local authorities, like a sheriff, when a case falls under federal law or interests.
Step 3: Application of Original Jurisdiction
The Supreme Court’s original jurisdiction is particularly relevant when a dispute arises between states. This authority is essential because such conflicts typically exceed the reach of lower local courts. Thus, the Supreme Court can make a final determination on the matter directly. Therefore, it’s clear that the correct answer regarding the Supreme Court’s ability to intervene is when one state sues another state for violating interstate trade.