What is a procedure normally assigned by an enroute controller to an arriving aircraft?

The correct response is STAR, which stands for Standard Terminal Arrival Route. It is a predefined route that air traffic controllers assign to arriving aircraft as they approach an airport. A STAR provides a standardized path for aircraft to follow when descending towards their destination while helping to manage air traffic more efficiently and safely. It simplifies the arrival process, allowing for easier coordination and sequencing of multiple aircraft, ultimately assisting in the safe integration of arrivals into the terminal airspace.

A SID, or Standard Instrument Departure, is utilized for aircraft departing from an airport, while an ODP, or Obstacle Departure Procedure, serves to guide aircraft safely away from obstacles after departure. The term "ZULU" typically refers to Zulu time or UTC, which is a standard time reference used in aviation, but it does not describe any aviation procedure.