Which of the following macOS features is most likely to use Bluetooth?

The correct answer is D. Continuity. Continuity is an Apple ecosystem feature category that allows Apple devices to work together, such as moving activity between devices or integrating nearby Apple hardware. Among the choices, it is the feature most likely to rely on short-range wireless communication such as Bluetooth, often along with Wi-Fi and iCloud. The A+ materials identify Bluetooth as a personal-area-network technology used for nearby device communication, pairing, and synchronization. The Mike Meyers/Mark Soper material also explains that mobile devices commonly expand and communicate wirelessly through Bluetooth with nearby accessories and devices. Terminal is a command-line interface, not a Bluetooth feature. Gestures are touchpad or touchscreen motions used for input. Mission Control is a macOS interface feature for viewing open windows and desktops. Continuity is the only listed feature that strongly depends on communication between nearby Apple devices.