Which of the following describes the "body" in coffee espresso?

The "body" of coffee espresso refers specifically to the mouthfeel or texture of the beverage, which is often described as viscous or syrupy. This characteristic contributes significantly to the overall drinking experience, as it affects how the espresso interacts with the palate. A fuller body can create a richer sensation, making the espresso feel more substantial in the mouth.

The final flavor, while important in the overall flavor profile of espresso, does not define its body. Similarly, the amount of crema produced and the bitterness of the espresso are distinct aspects; crema contributes to the visual appeal and texture of the espresso but does not equate to the body itself. Bitterness is one of the flavor notes developed during the brewing process and can be influenced by various factors, but it is separate from the body or mouthfeel of the drink. Therefore, the description that most accurately encapsulates the concept of "body" is its viscous mouthfeel.