What keyboard shortcut is used to stop speaking in NVDA?

The keyboard shortcut used to stop speaking in NVDA is the Control (Ctrl) key. This functionality allows users to quickly halt the speech output, which can be essential for individuals who need to manage the pace of the spoken content or require silence for concentration. By pressing the Control key, users gain immediate control over the screen reader's audio output without having to navigate through menus or settings, which is particularly useful in dynamic working environments.

The other options do not perform this specific function and are utilized for different commands within NVDA or other applications. Thus, recognizing the Control key as the command for stopping speech reinforces understanding of key accessibility features within NVDA.