When you try and start an engine, you hear a clicking sound but nothing happens. What is the potential problem?

All of the answers are potential problems:
- Dead battery: A dead battery will not have enough power to turn over the starter motor, which is why you hear a clicking sound but nothing happens.
- Excessive resistance in the solenoid: The solenoid is an electrical switch that engages the starter motor. If there is excessive resistance in the solenoid, it will not be able to engage the starter motor, and you will hear a clicking sound but nothing happens.
- Faulty starter: If the starter motor itself is faulty, it will not be able to turn over the engine, and you will hear a clicking sound but nothing happens.