රචනාවක ආරම්භය, දේහය හා සමාප්තිය - Start, Body, and End.

You have perfect freedom to write as you can, but of course it would be well to keep some proportion in your description. You should not give the most important points first and leave less interesting things for the end. It is always a good rule in writing an essay to begin and to end with sentences of more interest than others.