What is EXIF primarily used for?

EXIF, which stands for Exchangeable Image File Format, is primarily used to store metadata associated with image files. This metadata can include valuable information such as the camera settings (like shutter speed, aperture, and ISO), the date and time the photo was taken, geolocation data, and other characteristics of the image. By having this detailed information embedded within the image file, photographers and digital asset managers can better organize, retrieve, and edit images based on these attributes.

The other choices focus on programming and functionality aspects that are unrelated to the purpose of EXIF. Defining classes in programming pertains to object-oriented programming principles, controlling program flow relates to decision-making structures in code, and executing functions involves calling pre-defined code segments. These categories do not connect with the primary purpose of EXIF, which is centered on image metadata management.