Whenever you need to discuss aspects of a text, remember never to skim read it. Before you can write in any meaningful way about it you will need to have grasped its big picture. This means gaining an understanding of exactly what it is about, who it was written for and why it was written.
You will also need to consider what might have motivated the writer to write the text and the circumstances under which it was created, that is aspects of its writer's context. It can also be important to take account of genre conventions and expectations as well as aspects of the reader's context as interest and interpretation can sometimes vary according to the reader's own situation.
With these details you can then open your answer by creating an effective overview of the text - of its content, genre, audience and purpose. Details of its style are left for the remainder of your answer.
It is an unfortunate fact that each year many students give shallow answers in exams that show they have skim read their texts. The moral of this tale: don't be a skim reader!