Why shouldn’t you say ‘Priestley highlights Birling’s character?’ What else do you say?
He never actually highlights any character, he just uses them to represent a theme. Instead, say ‘I will be focusing on the character of Mr Birling to…’ or this is easier: ‘Priestley uses Mr Birling as the embodiment of…’
When given 2 not so good questions, what do you do?
How should you analyse quotes?
Don’t do basic language analysis. Make sure you only add contextual analysis of the text (it is analysis in relevance to the rest of the text) - make sure it serves a purpose for the point you’re making about the text.
How many different points do you make per paragraph?
Add as many different points as possible, since there is no additional credit for solidifying the same point with 3 quotes. Don’t spend the whole para on the same idea, instead make many different relevant points that link to rest of text and its wider idea.