Which of the following is a non-wireless communication system?

The correct answer is fiber optics, which is classified as a non-wireless communication system. Fiber optics utilize strands of glass or plastic fibers to transmit data as light signals, enabling high-speed communication over considerable distances without the use of radio waves or other wireless technologies.

In contrast, satellite communication, Wi-Fi networks, and Bluetooth technology rely on the transmission of data through radio waves, which qualifies them as wireless communication systems. Each of these systems operates by sending and receiving electromagnetic signals, emphasizing the distinctions between wireless and wired (fiber optic) communications.