Answer: phonographs
Step-by-step explanation:
Phonographs are for recordings and playing back audio/music and passing down information.
Lightbulbs are to light up a room so that you can see.
Electric batteries are batteries for your devices.
Motion pictures are pictures combined to create a scene. (Ex: cartoons, movies, shows, etc).
The phonographs are used for communication and for passing down information through generations.
Answer: phonographs