Answer: MACHINE OPERATED
Step-by-step explanation:
Think of the word automated. By using context clues is said “PEOPLE used to ring the bell. NOW its automated.” Words like now and used to signal that it the next event will talk about the opposite part. Also AUTOmated. The definition of AUTO is by itself. So something has to do it. A machine can! Make sure next time to use context clues and find root words to help you out! Hope this helped