Demodulation is essential feature of a

Explanation:

Demodulation is the process of extracting the original information-bearing signal from a modulated carrier wave. This process is an essential feature of a receiver.

When a signal is transmitted, it is often modulated to allow it to travel longer distances without significant loss of quality. Upon reaching the receiver, the signal must be demodulated to retrieve the original information. Without demodulation, the information sent by the transmitter would remain in its modulated form, making it unusable to the receiver.

∴ The correct answer is option 2 (Receiver).