In this assignment you will be taking photographs combining what you learnt in the first chapter about composition and what you have learnt in this chapter about focussing techniques.
Your best subject will probably be some kind of landscape. It does not need to be countryside, your local park would be sufficient.
Practice the techniques of combining composition and focussing together, so the correct focus point matches with your composition technique. For example if you are using the Rule of Thirds, then the subject on the third should be in focus, not the centre of the image.