What controls where one page ends and another begins in a document?

A page break is used to control where one page ends and another begins in a document. When a page break is inserted, it forces the text following the break to start on a new page. This is particularly useful for organizing content into separate sections without having to manually add blank lines or adjust margins.

In contrast, other options serve different purposes. A section break is typically used to separate different sections of a document, allowing for varying formatting within those sections, while a line break merely moves the text to the next line within the same paragraph. A paragraph break indicates the end of one paragraph and the beginning of another, but it does not affect the page layout in terms of starting a new page.

Overall, the key function of a page break is specifically to dictate page transitions in a document.