Answer the following question given this paragraph: 

Many common electric devices, such as doorbells, contain electromagnets. If they have moving parts, they are likely to have an electric motor. An electric motor is a device that uses an electromagnet to change electrical energy to kinetic energy.


Q: What do electric motors use to change electrical energy into kinetic?

 Choices:

- resonances

- generators

- fans

- electromagnets

A:
electromagnets
