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HFNC offers heated, humidified high flow that washes out nasopharyngeal dead space, provides mild distending pressure, and reduces work of breathing—first-line escalation after low-flow failure in bronchiolitis. Properly sized cannula (not occluding nares) and careful titration of flow/FiO₂ are essential. Immediate intubation (A) is reserved for refractory hypoxemia, apnea, or exhaustion; premature intubation increases complications in a transport environment. A non-humidified NRB (C) is uncomfortable, poorly tolerated, and does not address airway obstruction/mucus plugging. Opioids (D) risk respiratory depression. CCP-C priorities: frequent suctioning, thermoregulation, hydration management, continuous SpO₂ monitoring, and readiness to escalate to CPAP or invasive ventilation if SpO₂ or CO₂ deteriorate. Communicate early with the receiving pediatric facility and ensure equipment compatibility en route.