HDR photography allows you to capture a wider range of tones in a scene, resulting in an image with more detail and contrast.

Focus stacking is a technique used to combine multiple images taken at different focal lengths to create a single image with a greater depth of field. It is not commonly used in HDR photography.

Tone mapping is used to compress the dynamic range of an HDR image so that it can be displayed on a standard monitor or printed on a standard printer.

Motion blur is not a common HDR photography composition technique because it can make the image look blurry and distracting.

All of the above techniques can help to avoid ghosting in HDR photography. Using a tripod will keep the camera steady, shooting in manual mode will allow you to control the exposure settings, and using a fast shutter speed will freeze motion.

Portraits are not a common HDR photography subject because the high dynamic range of an HDR image can make it difficult to capture accurate skin tones.

Sunrise or sunset is the best time of day to shoot HDR photography because the light is softer and more diffuse, which can help to reduce ghosting and other artifacts.

Adobe Photoshop is not a common HDR photography software program because it does not have the same dedicated HDR tools as the other programs listed.

All of the above methods can be helpful for learning HDR photography. Reading books and articles can teach you the basics of the technique, watching online tutorials can show you how to use specific software programs, and practicing regularly will help you to improve your skills.

The most important thing to remember when shooting HDR photography is to have fun! Experiment with different settings and techniques, and don't be afraid to make mistakes. The best way to learn is by doing.