How is "deadly force" defined?

The definition of "deadly force" is best understood as a type of force that is used in situations where it is intended to cause death or serious bodily injury. This understanding stems from legal and law enforcement training, where the threshold for using deadly force is significant. It is primarily justified in scenarios where there is an imminent threat to life, such as in self-defense against a potentially lethal attack.

In contrast to the other options, which either suggest a lesser degree of harm or describe force in a defensive or excessive context, the focus on causing death or grievous bodily harm in the correct choice aligns with the serious nature and legal implications of using deadly force. This distinction is crucial for security professionals to understand, as it influences their decision-making in high-stakes situations, ensuring they know when such force is legally and ethically justified.