What must you do to make a rendering available for use with a placeholder on the Home page?

To make a rendering available for use with a placeholder on the Home page, the correct step is to add the rendering to the Allowed Controls of the Placeholder Settings item. This step is crucial because it directly controls which renderings can be assigned to that specific placeholder. By configuring the Allowed Controls, you ensure that the rendering you want to use is recognized by the Sitecore rendering engine at that location.

When the rendering is included in the Allowed Controls, it allows content authors to select it for that placeholder when editing the page content. This process is part of the Sitecore architecture, which relies on defined placeholders and their allowed renderings to maintain flexibility and control over how content is presented.

In contrast, making changes to the Layout definition or modifying settings in the Home item does not directly relate to the restrictions and permissions that placeholders enforce. While those actions can influence the rendering behavior and structure, they do not specifically control which renderings can be selected for use in that placeholder context. Setting a rendering as a default control is relevant for when there is no specific selection made, but it is not a prerequisite for making renderings available to placeholders. Thus, adding the rendering to the Allowed Controls is the essential step for enabling its use with the placeholder on the Home page