Which component processes amplitude-modulated signals received by its antenna?

The component that processes amplitude-modulated signals received by its antenna is the AM receiver. This device is specifically designed to demodulate the amplitude-modulated signals that are transmitted over the airwaves.

When an AM signal is received, the AM receiver extracts the original information (such as voice or music) from the modulated carrier wave by detecting variations in its amplitude. The process involves several stages, including tuning, amplification, and demodulation, allowing the receiver to convert these signals back into audio or other usable forms. This functionality is essential for enabling clear reception and playback of AM broadcasts.

In contrast to this, other options involve different processes or types of modulation that do not directly handle the amplitude-modulation needed for the reception and processing task described. Thus, the AM receiver plays a crucial role specifically tailored for amplitude-modulated signals.