What can be utilized to display both video and audio signals from one connection?

Using HDMI (High-Definition Multimedia Interface) is the most effective choice for displaying both video and audio signals from a single connection. HDMI supports high-definition video and multi-channel audio, making it a comprehensive solution for modern devices such as TVs, monitors, and projectors. This versatility is crucial in settings where space and cable management are important, as it reduces the number of required cables.

The other options, while having their own respective functions, do not carry video and audio together in the same manner. For instance, VGA (Video Graphics Array) is primarily designed for video output only and does not support audio transmission at all. DVI (Digital Visual Interface) can transmit digital video signals but typically does not carry audio, although some variations of DVI can support audio with appropriate adapters. Likewise, SDI (Serial Digital Interface) is used mainly in professional video applications for transporting video signals over coaxial cables and does not carry audio without additional formats or adapters.

In summary, HDMI's capacity to integrate audio and video into a single streamlined connection makes it the most suitable option in this context.