What is required for a themelet to be used in a specific theme?

For a themelet to be utilized within a specific theme, it is essential that the themelet is installed in that theme. This installation process incorporates the themelet's resources into the parent theme, allowing for seamless functionality and integration. Themelets are designed to extend the capabilities and design of a particular theme, providing additional style or modifications without altering the core theme structure.

When a themelet is installed correctly, it can modify various aspects of the theme, such as layout, styling, and components, thus enhancing the overall user experience. This integration ensures that the enhancements provided by the themelet are effectively applied when the theme is rendered.

The other options do not accurately reflect the requirements for utilizing themelets. For instance, while it's true that themelets can offer particular functions and features, they depend on being installed within a theme to operate properly, making the installation requirement crucial for their use.