Which of the following technologies is primarily used for short-range wireless communication?

Bluetooth is primarily used for short-range wireless communication, making it the correct choice. This technology enables devices to communicate with each other over distances typically ranging from about 10 to 100 meters, depending on the class of the Bluetooth device. It is widely used for connecting peripherals such as headphones, keyboards, mice, and smartphones, allowing for convenience without the need for wired connections.

Wi-Fi, while also a wireless communication technology, is generally utilized for broader range communication, typically covering distances of up to several hundred meters and is designed for connecting devices to networks, especially for internet access. Zigbee is another wireless technology, specifically designed for low-power, low-data-rate applications often in home automation and sensor networks, but its range is similar to Bluetooth. Li-Fi, on the other hand, uses light to transmit data and is not categorized under traditional wireless communication technologies for short distances in the same manner as Bluetooth or Wi-Fi. Thus, Bluetooth stands out as the primary technology specifically tailored for short-range interactions among devices.