Which activity is considered hazing in the military?

The activity identified as hazing in the military is an unnecessary physical challenge without consent. Hazing involves imposing a humiliating or abusive experience on an individual, typically for the purpose of initiation or to exert power over them. This aligns with the description of an unnecessary physical challenge that lacks the participant's consent, as it can create a toxic environment and negatively impact morale and unity within a unit.

In contrast, friendly games between team members foster camaraderie and team spirit, while formal training exercises are integral to military readiness and skill development. Volunteering for community service is a positive activity that encourages teamwork and community engagement. All of these options serve constructive purposes, which is why the second option stands out as the definition of hazing in the military context.