Two things to keep in mind when you're deciding whether to use formal or informal English are the B) occasion and the audience.
Of course you are going to change the way you talk depending on whether you are speaking to your friends or to your teacher - usually with the teacher you are going to use more formal English.
Occasion is also important - you won't speak in the same manner at a party and a cocktail.
Answer:
I have no clue what to do for this is there something else you need to put
please dont post questions like this! Brainly is a learning app for many people (including minors) ><
Close-ended question, usually only has one answer without any elaboration or opinions
When is your birthday?