What does a receiver do in TBS systems?

The correct choice accurately describes the primary function of a receiver in TBS systems. A receiver's fundamental role is to capture incoming radio signals, which are often in the form of electromagnetic waves carrying information. Once these signals are captured, the receiver processes them to decode the original information, converting it back into a format that can be used, such as audio, video, or data.

This function is crucial in communication systems because, without the ability to effectively receive and decode radio signals, the intended information would remain inaccessible. The receiver ensures that the signals which have traveled through the air or other mediums can be understood and utilized by the end device, thus enabling communication.

In contrast, other functions mentioned in the choices, such as encoding information onto a carrier wave or modulating the carrier wave, are typically tasks performed by transmitters rather than receivers. Amplifying signals is also essential, yet it more specifically relates to improving signal strength during transmission rather than the main role of decoding and converting information, which is what the receiver is fundamentally designed to do.