What does the safety on a firearm do?

The function of a firearm's safety is to serve as a device that blocks the action to prevent accidental firing. When the safety is engaged, it ensures that the firing mechanism cannot be activated, reducing the risk of an unintentional discharge. This feature is critical in promoting safe gun handling practices by providing an added layer of protection against accidental shootings, especially during handling, transport, or storage of the firearm.

Other options are not accurate representations of what a safety does. For instance, while aiming might require proper technique and sight alignment, it has nothing to do with the safety mechanism itself. Similarly, the safety does not impact bullet speed; factors like barrel length and the type of ammunition determine that. Lastly, a firearm does not depend on the safety to hold ammunition, as this function is performed by magazines or loading chambers.