Final answer:
The subheading is the text feature that previews the paragraph that follows, providing a brief description or summary.
Step-by-step explanation:
The text feature that previews the paragraph that follows is the subheading. A subheading is a title or heading that appears below the main heading and above the start of a new section or paragraph. The purpose of a subheading is to give a preview of the topic that will be discussed in the following text, acting as a sort of introduction or summary.
This helps readers to navigate the text and understand the structure of the content, making it easier to find information. Unlike images, sidebars, or the main title, the subheading is specifically associated with and gives insight into the immediate text that comes after it.