Which of the following is a wireless communication method?

The correct answer is based on the fact that infrared waves are a form of wireless communication. This method utilizes infrared light waves to transmit data between devices without the need for physical cables. Infrared communication is commonly used for remote controls, short-range data transfer, and other applications where line-of-sight is possible.

In contrast, twisted pair cabling, coaxial cables, and fiber-optic cables are all wired communication methods. Twisted pair cabling consists of pairs of insulated copper wires twisted together to reduce electromagnetic interference, often used in telephone and Ethernet networks. Coaxial cables, with a central conductor surrounded by insulation and shielding, are used for cable television and internet connections. Fiber-optic cables transmit data as light signals through glass or plastic fibers, allowing for high-speed data transmission over long distances. Although these latter options are prevalent in telecommunications, they do not involve wireless technology, distinguishing infrared waves as the only wireless method among the choices presented.