What provides numerous built-in styles to apply to selected text in a document?

The Styles gallery is the correct choice because it offers a range of pre-defined styles that can be directly applied to selected text in a document. These styles are designed to quickly format text with consistent elements, such as font, size, color, and spacing, which helps maintain a uniform appearance throughout the document.

This feature enhances efficiency by allowing users to apply complex formatting with just a single click, rather than manually adjusting individual text attributes. It also aids in creating a cohesive design by promoting stylistic consistency, particularly in longer documents.

The other options do not provide the same comprehensive set of formatting options: the Font menu focuses primarily on font type and size, the Format painter allows for copying formatting from one part of the document to another but does not provide a selection of styles, and Paragraph settings deal with line spacing and indentation rather than holistic text styles.