What trait is demonstrated by someone who puts the welfare of others above their own?

The trait demonstrated by someone who places the welfare of others above their own is unselfishness. This characteristic reflects a selfless disposition, wherein individuals prioritize the needs and well-being of others, often sacrificing their own interests in the process. Unselfishness is fundamental in leadership and teamwork, particularly in military settings, where the success of a mission often relies on the ability of individuals to support one another and work collaboratively for the common good.

In contrast, integrity refers to adhering to moral and ethical principles, which, while important, does not exclusively encompass the idea of prioritizing others' welfare. Enthusiasm relates to a passion or eagerness for tasks, and while it contributes to a positive environment, it doesn't specifically address selflessness. Confidence involves self-assurance in one’s abilities, which is crucial for effective leadership but again does not focus on the aspect of prioritizing others. Therefore, unselfishness is the key trait here, as it directly aligns with the behavior of putting others first.