How did 'Hello?' become the word you say when you answer the phone?\xa0Why was the handshake invented?\xa0How do\xa0animals\xa0greet\xa0each other? For free home activities sign-up at www.WhoSmarted.com\nSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.