All doorbells make pretty sounds. A battery is the best power source for a doorbell. Most people prefer to use a doorbell over knocking. The doorbell uses a piece of wire wrapped around a magnet.
Students are investigating how a doorbell works. Which is most likely an observation made during the investigation?

Options:
- All doorbells make pretty sounds.
- A battery is the best power source for a doorbell.
- Most people prefer to use a doorbell over knocking.
- The doorbell uses a piece of wire wrapped around a magnet.

The doorbell uses a piece of wire wrapped around a magnet.