Professional environment is a more formal environment. It could be a work environment. In this environment formal behavior is important because formality boosts the performance. Indeed, it might be dealing with the seriousness of the issue. Let us just imagine vice-versa. When the work is not serious, it cannot create responsible environment because some people will free ride. Therefore, professional environment has its own standards in comparison with personal environment. Personal environment can also be formal, but it is not a necessity.
C.80, because his mental age is less than his actual age.
Hey, this is Mr. Mungall, your teacher--and since I created this content and own the copyright, I suggest you call me so I can help you with the content directly.
