Final answer:
Justifiable physical force can be used in self-defense or in retaliation against those who initiate force. Defensive force is used to protect oneself, and retaliatory force seeks retribution against aggressors.
Step-by-step explanation:
Justifiable physical force that would otherwise constitute an offense can be used by individuals in self-defense or in retaliation against those who have initiated force upon them. This concept is supported by the principle that force to safeguard one's survival and justice is welcomed into non-coercive policy. For example, defensive force is used when someone's personal rights are threatened, and retaliatory force is a form of retribution against those who have acted aggressively.