How do I ensure that I answer the question but also reveal how much knowledge I have acquired through revision and practice?

When you have invested a lot of time and energy into your revision, it is understandable that you want to convey this to your examiner. The way to do this is not, however, by setting down as much information as possible on the paper. Try not to think of the examination as a memory test but rather a test of what you can do with the knowledge you have acquired throughout your study. If knowledge is your material, structure is your scaffolding; it allows you to build a sturdy argument that is creative and ambitious but never strays from the question. To achieve this, I recommend you consider your plan as an architectural blueprint for your essay. The introduction is your foundation: it must be strong as it informs the examiner of how you intend to answer the question and briefly foregrounds the evidence that you will be providing. Each paragraph thereafter can be seen as a block to build your argument, with the topic sentence and final sentence constructing a frame around it. This frame enables you to clearly indicate how the information you have selected contributes to the greater argument. Keep these sentences succinct. Make your point clearly within the first sentence, provide your evidence and analysis throughout the paragraph, and reinforce why this proves your argument with the closing sentence. When planning the essay, think carefully about how you order these paragraphs. You are not drawing disconnected points together into a patchwork; instead, each paragraph should build upon the last and thus fortify the argument as a whole. When you reach the conclusion, bind the argument together as tightly as possible by reiterating the main points. You may also choose to gesture to knowledge that could not be included due to the limited scope of the question. This reveals comprehensive revision, ability to discern the most relevant material, and an understanding of how your argument might progress, were you given more space and time. Finally, have confidence in your own words: end on a compelling note, not a quote.