Answer:
Formal language.
I hope this helps :)
Explanation:
Formal language is based on the correct use of grammatical norms as well as on the good pronunciation of words and should be used in situations of work, intellectual or academic activity. In a critical essay, it is imperative to use a formal language, since it is something serious and requires credibility.
You should use informal language only in day-to-day situations with close people as relatives and friends, but never in an analysis or in the work environment.
