Final answer:
Call routing refers to the method of responding to a telephone request for emergency service by transferring the call directly to the appropriate public safety agency or emergency service provider.
Step-by-step explanation:
The method of responding to a telephone request for emergency service by which a PSAP transfers the call directly to the appropriate public safety agency or other emergency service providers is called call routing. Call routing involves determining the most appropriate destination for a call based on various factors such as the caller's location and the type of emergency being reported. For example, when someone dials 911, the call is routed to the nearest emergency response center.