Which responsibility includes executing measures against UAS threats?

The responsibility that specifically includes executing measures against Unmanned Aerial Systems (UAS) threats is UAS countermeasures. This option focuses directly on the strategies and actions taken to mitigate or neutralize risks posed by UAS, which can include a variety of threats to military operations, assets, and personnel.

UAS countermeasures are crucial in ensuring the safety and security of forces against potential surveillance, attack, or disruption by unmanned systems. These measures can encompass a range of tactics, including electronic warfare, target jamming, and kinetic interventions designed to incapacitate or destroy hostile UAVs.

In contrast, other options such as unit self-defense focus more on the general defensive measures a unit takes to protect itself from a variety of threats, not specifically targeting UAS. Similarly, mission-specific RUF pertains to the rules governing the use of force applicable to a particular mission but do not exclusively address the unique challenges posed by UAS threats. Coordination of SRUF involves organizing and managing the standing rules, which is essential but does not include the execution of specific actions against UAS threats.