Which Apple app is primarily used for managing and editing photos?

The app primarily used for managing and editing photos is Photos. This application is designed specifically for users to organize, edit, and share their photographic images. Within the Photos app, users can access various features such as creating albums, applying filters, adjusting lighting and colors, and even utilizing advanced editing tools. It serves as a comprehensive solution for storing and enhancing photos taken with Apple devices, ensuring a smooth experience for users looking to work with their visual content.

In contrast, the other applications listed—like Pages, Keynote, and Numbers—focus on different functions; Pages is utilized for word processing and document creation, Keynote is used for making presentations, and Numbers is specifically designed for spreadsheets and data analysis. These apps are not intended for photo management or editing, highlighting why Photos is the correct choice for this question.