Final answer:
The alignment property of a VBox determines how its children elements are positioned within the layout. Option d.
Step-by-step explanation:
A VBox's alignment determines the layout positioning of its children. The alignment property dictates how the children of the VBox will be positioned within the box when there is extra space available. For example, if the alignment is set to center, all the children will be positioned in the center of the VBox.
This is particularly important when designing a user interface as it affects the visual organization and the user experience. A VBox's alignment determines the layout positioning of its children. The alignment property dictates how the children of the VBox will be positioned within the box when there is extra space available. For example, if the alignment is set to center, all the children will be positioned in the center of the VBox.