The term which best describes "when a group or person has power or legal authority over a topic or area" is:
3. Jurisdiction.
Explanation:
Jurisdiction refers to the lawful authority given to a person or institution to govern or legislate, exercise authority, or control decisions or judgments. Such authorities are usually exercisable within a specific geographic area, topic, and/or over certain types of legal cases. This means that the given authority is not universally blanket. Instead, it is limited to a particular area, topic, or issue.
