The display sequence is controlled in a Service Catalog Item using which of the following?

The Default Value field sets a pre-selected value for a variable, not its display sequence.

While Catalog Items have a sequence field, it typically controls the order of catalog items within a category, not the order of variables within a single item.

The "Order" field on a Variable form within a Service Catalog Item determines the sequence in which that variable appears to the user when they access the catalog item. A lower number in the Order field means the variable will display higher up in the form.

The Choice field is used to define the available options for choice list variables, not to control their display order.