What is the common category for all the beverages mentioned in the text?

The common category for the beverages mentioned is tea. This is correct as tea encompasses a wide range of drinks, including various types of brewed leaf infusions, such as black tea, green tea, herbal tea, and chai, which are commonly offered in many establishments, including Starbucks. Understanding that tea is a distinct category helps differentiate it from other beverages like coffee, juice, and soda, which are separate categories and do not encompass the same variety of drinks or preparation methods that fall under tea.