Which of the following wines is categorized as sparkling?

The choice of Verve Clicquot Champagne as categorized as sparkling wine is accurate because Champagne is a specific type of sparkling wine produced in the Champagne region of France. It undergoes a secondary fermentation process in the bottle, which introduces carbon dioxide and creates the signature effervescence. This process results in the bubbles that are characteristic of sparkling wines.

In contrast, the other options listed, such as Caliterra Sauvignon Blanc, Burrowing Owl Pinot Gris, and Mansion House Bay Sauvignon Blanc, are all types of still wines. These wines do not undergo the secondary fermentation that creates the carbonation found in sparkling wines. Therefore, identifying Verve Clicquot Champagne as the sparkling option is correct due to its unique production method and the presence of bubbles, which are defining elements of sparkling wines.