What element can you add to a blog post to determine the content shown on the short form version on your blog's homepage?

The read more separator is the correct choice because it serves as a specific marker that instructs the HubSpot CMS where the main content of a blog post ends and where the summary or short version begins. When this separator is added, it allows the homepage to display a concise version of the blog post, enticing readers to click through to the full article. This functionality is essential for maintaining a clean and engaging layout on the blog's homepage, as it prevents the entire post from being displayed and instead encourages readers to explore a range of articles.

The other options do not fulfill this role. For example, a call to action is used to direct readers toward taking a specific step, but it does not dictate how content is displayed on the blog homepage. A personalization token is designed to customize content for individual users, enhancing user experience without influencing the layout of the blog post previews. Lastly, a paragraph break is used for formatting text within blog posts but does not provide any functionality for controlling how content is summarized or displayed on the blog’s homepage.