When we use terms such as personal, impersonal, self-talk, common purpose, and audience, we are talking

Communication

Explanation:

According to my research on studies conducted by various sociologists, I can say that based on the information provided within the question when mentioning these terms we are talking about different aspects of Communication. Every one of the terms mentioned in the question is a different aspect or category of Communication, like for example Impersonal communication is Communication with others as if they are objects or roles. While Self-Talk is Communication within us that is specifically about ourselves.

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the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.