## Core Concept
The core concept here revolves around the initial steps in neonatal resuscitation, particularly for newborns who fail to breathe at birth. Neonatal resuscitation is crucial for ensuring the newborn's transition to extrauterine life is successful, especially when they exhibit respiratory distress or failure to initiate breathing.

## Why the Correct Answer is Right
The correct answer, **positive pressure ventilation (PPV)**, is considered the single most effective step in resuscitating babies who fail to breathe at birth. When a newborn fails to breathe, it indicates the need for assistance to establish adequate lung inflation and gas exchange. PPV helps in expanding the lungs, improving oxygenation, and stimulating the respiratory drive. It is initiated with a T-piece resuscitator or a self-inflating bag-mask device, aiming to achieve a peak inspiratory pressure (PIP) that facilitates lung inflation without causing injury.

## Why Each Wrong Option is Incorrect
- **Option A:** While **intubation** might be necessary in certain cases of neonatal resuscitation, especially if bag-mask ventilation is ineffective or if the newborn requires high levels of positive end-expiratory pressure (PEEP), it is not the first line or the single most effective initial step for all newborns who fail to breathe at birth.
- **Option B:** **Administration of oxygen** is important but not as immediately effective as PPV in stimulating breathing in a newborn who fails to breathe. Oxygen saturation can be improved with PPV, making this step secondary to establishing ventilation.
- **Option C:** **Chest compressions** are indicated if the newborn shows signs of cardiac compromise or if there is no response to PPV after 30 seconds of adequate ventilation. However, they are not the first step in resuscitating a newborn who simply fails to breathe.

## Clinical Pearl / High-Yield Fact
A key point to remember is the **"ABC" approach** in neonatal resuscitation: **Airway**, **Breathing**, and **Circulation**. For a newborn who fails to breathe, the immediate priority is to establish an open airway and provide **Breathing support** through positive pressure ventilation before moving on to assess circulation or need for chest compressions.

## Correct Answer: .