Final answer:
The correct next step after administering the shock in the case of ventricular fibrillation is to resume chest compressions immediately.
Step-by-step explanation:
The correct next step after administering the shock in the case of ventricular fibrillation is to resume chest compressions immediately. This helps to circulate the blood and oxygen throughout the body. Chest compressions should be continued until further medical intervention is available or until the person shows signs of life.