Jon often uses profanities when he is out with his friends, but he is always polite when he visits his grandmother. this example illustrates which principle of interpersonal communication

The correct answer is: The principle illustrated here is: Communication is contextual.

There are a few contexts included in this principle and they are:

1) Psychological (our emotions, mood). Our feelings and the feelings of people we communicate with influence how we communicate.

2) Situational - The way in which we communicate depends on the situation we are in; we communicate differently at school, a cafe, at home, etc.

3) Cultural - Our way of communicating depends greatly on the culture we were raised in, as different cultures communicate in completely different manners sometimes.

4) Relational - Our communication also depends on the relationship we have with the person we are talking to. We speak differently to our parents, teachers/ professors, coworkers, grandparents, etc.