A) 1. Shaking hands
Shaking hands in greeting or to seal a contract has been done since at least the second century BC. The gesture demonstrates that the hand holds no weapon, and is a symbol of good sportsmanship, equality, and trust. Shaking the right hand sealed a bargain, but it was important not to use the left hand, as the left handshake dissolved a bargain.
2. Public toilet sign Toilet signage is such a deeply embedded part of contemporary life, writes Lynne Ciochetto, that most people are oblivious to the layers of meaning embedded in the signs themselves. As Ellen Lupton and J. Abbott Miller once pointed out, people never read the signs as saying ‘man or woman for sale’. The specific meanings ascribed by the particular context have been learnt across cultures, though the first assumption seems to be universal: men and women’s lavatorial activities need to be segregated. The early signs were text-based but increasingly mobile populations in the twentieth century encouraged the development of pictorial systems that did not require shared language. With accelerating globalization of tourism and business, toilet signage has become an international phenomenon, especially in airports, train and bus stations. In calmer places the lavatory becomes a gallery of folk art, a vehicle for representing universal gender differentiation, local culture and personal expression.
3. Exit sign
An exit sign is a device in a public place (such as a building, aircraft or boat) denoting the location of the closest emergency exit in case of fire or other emergency.
Exit signs are designed to be absolutely unmistakable and understandable to anyone. In the past this generally meant exit signs that show the word "EXIT" or the equivalent in the local language, but increasingly exit signs around the world are in pictogram form, with or without text supplement. The modern sign’s wordlessness means it can be understood even by people who don’t speak the local