What is the practice of ensuring clarity and appeal in text arrangements known as?

The practice of ensuring clarity and appeal in text arrangements is known as typography. Typography encompasses the style, arrangement, and appearance of typeset text, which includes considerations such as font selection, spacing, line length, and layout. Effective typography is crucial in enhancing readability and creating a visually attractive presentation of the text, making it a fundamental aspect of interactive design. By focusing on the aesthetics and functionality of text, typography helps to guide the viewer's eye and can significantly impact user experience.

Other concepts listed, such as hierarchy, composition, and visual style, while related, serve different purposes in design. Hierarchy refers to the arrangement of elements to signal importance and guide viewers through content. Composition deals with the overall layout and organization of visual elements, while visual style encompasses the broader aesthetic approach to a design project, including the use of colors, images, and typography. Thus, while these aspects are important in design, they do not specifically address the clarity and appeal of text arrangements in the way typography does.