What is the common file extension for Apple Pages documents?

The correct answer, .pages, is the designated file extension used for documents created with Apple Pages, which is Apple's word processing application. This extension is specific to Pages and indicates that the file is formatted to be opened and edited within this particular software. When saving a document in Pages, users will see the .pages extension in the file name, which enables compatibility with Pages’ features such as text formatting, images, shapes, and other document elements unique to the application.

In contrast, other file extensions mentioned, such as .docx, .pdf, and .pptx, are associated with different types of documents and applications. For example, .docx is the standard file format for Microsoft Word documents, .pdf is a format for portable documents that are typically read-only and not editable in traditional word processors, while .pptx is the file extension for Microsoft PowerPoint presentations. These formats serve different purposes and are optimized for their respective software, further highlighting the uniqueness of the .pages format in the Apple ecosystem.