How does an AED affect the rhythm of the heart? It massages the chest to stimulate the return of the heart’s normal rhythm. It can deliver an electrical shock that restores the heart’s normal rhythm. It sends an electrical signal to the brain to correct the rhythm of the heart. It induces cardiac arrest so that the rhythm of the heart can be restarted.

The answer is "It can deliver an electrical shock that restores the heart’s normal rhythm."

Explanation:

An AED is a type of computerized defibrillator that automatically analyzes the heart rhythm in people who are experiencing cardiac arrest. When appropriate, it delivers an electrical shock to the heart to restore its normal rhythm

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there