The correct answer would be the following: A stranger may feel uncomfortable if you have a cell phone conversation while standing 18 inches or closer to him or her, specially if the conversation if loud, long, or highly personal. This is because you would be invading that person´s intimate/personal space. Proxemics is the branch of knowledge that studies the amount of space that people feel necessary to have between themselves and other people, specially with strangers. Personal space varies depending the culture of the person, some cultures need a bigger amount of personal space than others. Within our personal space we feel safe and comfortable, and when someone invades it in an unwelcome way, that safety disappear and we may start to feel uncomfortable.
