Which beverage corresponds to the type "L"?

The correct choice, which is the latte, corresponds to the type "L" due to its distinct preparation and characteristics. A latte is a popular espresso-based drink that combines espresso with steamed milk, typically topped with a small amount of milk foam. This beverage has a creamy texture and balance between coffee flavor and milk sweetness, making it one of the most well-known types in coffee culture.

The latte stands out from other options as it directly involves espresso and milk in its formulation, distinguishing it from beverages that may not involve espresso at all, like milk alone or a steamer, which is primarily steamed milk with flavoring and lacks the espresso component that defines a latte. While an espresso macchiato does contain espresso, its defining feature is the small amount of milk added, often not enough to categorize it under the "L" type beverage characteristic.