(Backgrounds) Why would you choose to include a real-world object in your portrait's background instead of a plain backdrop? What is one camera setting you can use to make sure a busy background doesn’t distract from your subject?
(Rule of Thirds) Why is placing your subject right in the middle of a photo often considered "boring"? How does leaving empty (negative) space in the direction your subject is looking help tell a story?
(Focusing & Cropping) When you lock focus on a subject's eye and shift your camera to recompose (crop) the shot, what physical mistake must you avoid to keep their eye perfectly sharp?
(Subject Scaling) Why should you avoid enlarging your photo using the sides, top and bottom? What happens? How should you enlarge (scale) a photo to change its size?