Proportionality in use-of-force training means matching the level of force to the actual threat, prioritizing de-escalation and the use of alternatives, and applying only the minimum amount of force necessary to stop the threat or gain control. In training, you practice accurately assessing threat level, considering options such as verbal commands, distance, barriers, or containment, and then escalating force only as needed and for as long as necessary. This approach is the best because it reinforces safety, legality, and ethics: you start by trying to de-escalate and use the least intrusive means, and you increase force only when the threat requires it, while continually reassessing as the situation evolves. It aligns with principles of necessity and reasonableness that govern real-world decisions. Other options miss the mark because they either ignore the need to de-escalate and use alternatives, rely on unchecked personal judgment without objective threat assessment, or suggest that proportionality doesn’t matter in training.