Which term describes work with the Armed Forces that is not combat-related?

The term "perform noncombatant services" specifically refers to responsibilities or roles that support the Armed Forces without engaging in combat. This can include a wide range of supportive activities, such as medical assistance, logistics, administration, or engineering tasks, that contribute to military operations while avoiding direct engagement in battle.

In contrast, the other options describe different aspects of military service. "Bear arms" refers to actively participating in combat with weapons, which clearly does not align with noncombatant roles. "Perform work of national importance" can encompass a broader scope of service, including civilian work that supports the nation but does not specifically denote military or noncombatant work. Lastly, "desert" refers to the act of abandoning military duty, which is not relevant when discussing noncombat-related work within the Armed Forces. Therefore, the choice accurately reflects a fundamental distinction within military service.