Final answer:
After the AED delivers a shock, you should immediately restart CPR, beginning with chest compressions.
Step-by-step explanation:
After the AED delivers a shock, the correct action to take is to immediately restart CPR, beginning with chest compressions. Providing continuous chest compressions is crucial for maintaining blood flow to the vital organs. It is also important to note that providing breaths to the victim is no longer recommended as part of CPR.