What action should be taken for a young female who is not breathing and has been assessed in a triage situation?

For a young female who is not breathing in a triage situation, placing a black tag on her and moving on to the next patient indicates that she is not likely to survive given the available resources and urgency of other patients' needs. In triage, the primary goal is to prioritize treatment based on the severity of conditions and the likelihood of survival. The black tag designates a patient as 'expectant' or 'do not resuscitate' when their clinical condition is such that immediate life-saving interventions are not feasible or when they are unlikely to survive even with immediate care.

In contrast, immediate resuscitation attempts would generally be appropriate if there is hope for recovery, while checking for vital signs or requesting additional medical assistance may delay essential care for those who can be successfully treated. The triage process requires rapid decision-making to utilize resources effectively, especially in mass casualty situations, hence the action of tagging and prioritizing other patients is critical.