How did Alexander Graham Bell revolutionize communication with his invention of the telephone, and what impact did this have on the way people greet each other?

Alexander Graham Bell revolutionized communication with his invention of the telephone by allowing people to speak to each other over long distances in real-time. This invention changed the way people greeted each other by enabling them to connect instantly and communicate more efficiently, leading to a shift from written letters to verbal conversations as the primary form of communication.