The nurse is assessing a 2-year-old hospitalized for the treatment of pneumonia. Which finding indicates the child is experiencing respiratory failure?

Choice A reason: Tachycardia is a compensatory response to hypoxia or fever but does not alone indicate respiratory failure. It is an early sign of distress, not a definitive marker of failure. Choice B reason: Retractions indicate increased work of breathing and respiratory distress. They are concerning but not definitive for respiratory failure unless accompanied by other signs such as altered mental status or hypoxia. Choice C reason: Difficulty to arouse is a late and serious sign of respiratory failure. It suggests hypoxia affecting cerebral function and indicates that the child is decompensating. Immediate intervention is required to prevent further deterioration. Choice D reason: Pink skin color suggests adequate oxygenation and perfusion. It is a reassuring sign and does not indicate respiratory failure.