What device provides information on range, azimuth, and/or elevation of objects?

The correct answer is radar because it is specifically designed to identify and measure the distance, angle, and height of objects. Radar systems utilize radio waves to detect objects' position and movement by analyzing the reflected signals from those objects. It provides crucial data regarding range (the distance to the object), azimuth (the angle in a horizontal plane), and elevation (the vertical position), all of which are essential for tracking and navigating aircraft efficiently.

In contrast, a transponder is primarily used for responding to interrogation signals for identification purposes and does not inherently provide range or elevation information. A decoder processes signals and converts them into readable formats but does not have the capability to measure distances or angles. An antenna, while integral to emitting and receiving signals, serves more as a transmitter or receiver and does not provide direct data on range, azimuth, or elevation on its own.