Colour adds eye-appeal, impact and emphasis. Spot colour catches the eye. Illustrations and photographs add interest, clarity and emotional impact. Graphs and charts ease understanding but can be very selective in what they show. Maps may be helpful.
Cartoons add humour.
When you write about a text, it is always important to support what you say by using evidence from the text itself. This is often best in the form of a suitable but short quotation. Follow this by commenting in depth on this evidence to show how it works and how it adds to the overall effect of the text. Finally, always check your writing In this part of the exam, accurate, clear and fluent writing is important. Each year the examiner's report mentions how many students gained a lower grade simply because they failed to check and correct their writing.