What element is primarily responsible for receiving signals in a telecommunications system?

The element primarily responsible for receiving signals in a telecommunications system is the receiver. This component is designed to accept incoming signals, whether they are radio waves, optical signals, or other forms of electromagnetic signals, and convert them into a usable format. The receiver plays a crucial role in communication, as it ensures that the transmitted information is accurately captured and processed for further use.

While other components like transmitters and antennas are vital in the overall communication process—transmitters send signals out and antennas can both transmit and receive signals—the receiver specifically encapsulates the function of taking in those signals. The transmitting medium facilitates the journey of signals from the transmitter to the receiver but does not perform the role of signal reception itself. Thus, in the context of receiving signals, the receiver is the most appropriate choice.