What provides the appearance and location of elevator parts?

The correct choice, which refers to the field wiring diagram, is significant because it illustrates how various components of an elevator system are interlinked in real-world applications. This type of diagram details the connections and layout of wiring in the actual field environment where the elevator is installed, providing essential information on how the system functions in service.

Field wiring diagrams typically show the positioning of different parts such as sensors, controllers, and motor connections, along with their wiring paths. This aids technicians in troubleshooting and maintaining the elevator system, as it precisely reflects the arrangement and architectural nuances of the installation.

On the other hand, schematic diagrams usually provide a simplified representation of how electrical circuits work, which does not typically correspond to real-world part positioning. Blueprints offer architectural layouts of buildings or equipment but lack detailed wiring information. Control panel diagrams focus on the functionality and layout of the control system but do not necessarily depict the placement of all elevator components in the field.