In order to close a Loft in SolidWorks, what action must you take?

To effectively close a Loft in SolidWorks, the correct action involves clicking the "close loft" option in the dialog box. This is essential when creating a lofted surface or solid, as the close loft function ensures that the two open profiles—typically at each end of the loft path—are connected seamlessly, forming a closed geometry. This action is particularly important for creating a closed shape that can be further manipulated or utilized in the design process, such as when creating parts that require a fully enclosed volume.

Selecting the "close loft" option directly from the dialog box provides the user with immediate feedback and confirmation that the loft operation has been properly adjusted to form a closed profile. This method enhances the user's control over the loft creation process, allowing for adjustments to be made before finalizing the feature. This is why this specific action is emphasized in the context of lofting features in SolidWorks.

Understanding how to properly close a loft is critical for successful part modeling, especially in complex designs where clean and continuous surfaces are required.