Final answer:
Focusing issues may arise when the subject is out of focus in an image, which can be addressed by filling the frame with the subject or employing direction of movement techniques.
Step-by-step explanation:
When you capture an image where the moving subject is out of focus but the background is in focus, you are dealing with a situation where the focus may not have been appropriately set on the subject. To ensure that the subject is the main focus of the image, you can use techniques such as filling the frame with the subject or utilizing the direction of movement to emphasize the subject's motion. For filling the frame, you can either get physically closer to the subject or use a longer focal length lens, such as a 200mm lens, to capture the details. Additionally, understanding the concept of leading space or changing the shooting angle can help direct attention to the subject and away from a distracting background.