How are targets engaged when utilizing the Final Protective Fires (FPL)?

The correct answer emphasizes that targets are engaged according to unit commander orders, which is crucial in the context of Final Protective Fires (FPL). This method is essential for maintaining coordinated and effective fire while ensuring that all units involved are aware of the engagement protocols. The unit commander's orders provide the necessary context and directives for the engagement, aligning with the broader tactical operations and the unit's specific mission.

Engaging targets based on commands ensures that the use of firepower is synchronized with the unit's overall strategy and situational awareness. This can include considerations such as the operational environment, potential collateral damage, and the safety of friendly forces.

The other options misrepresent the nature of engagement in FPL. A strict order from the battalion commander does not account for the dynamic nature of battlefield commands and the need for immediate responses based on changing situations. Engaging targets as a result of opportunity fire can lead to uncontrolled or unsynchronized firing that may not align with the safety and tactical considerations of the unit. Relying solely on a predetermined range would overlook the variability in target positioning and lead to ineffective response capabilities, ignoring the need for flexible and timely decision-making by the unit commander.