Question

why is an aed needed?
choose the correct answer
to measure the victims pulse
to analyze the heart rhythm and provide a shock
to replace ventilation and chest compressions

Explanation:

An AED (Automated External Defibrillator) is a medical device. It analyzes the heart rhythm. If it detects a shock - able rhythm (like ventricular fibrillation or pulseless ventricular tachycardia), it provides an electric shock to try to restore a normal heart rhythm. Measuring the pulse is usually done manually or with simpler pulse - oximeter - like devices (not the main function of AED). And AED does not replace ventilation and chest compressions; in fact, CPR (which includes chest compressions and ventilation in some cases) is often used in conjunction with AED.

Answer:

To analyze the heart rhythm and provide a shock