What is a characteristic of a catamaran hull?

A catamaran hull is characterized by its two parallel hulls, which significantly contributes to a stable ride. This design allows for increased stability in the water, reducing the likelihood of capsizing and making it less prone to rolling compared to single-hull vessels. The wide stance of the catamaran's hulls effectively disperses waves and minimizes the lateral movement that can cause discomfort or instability.

While catamarans can indeed achieve fast speeds due to reduced drag and often incorporate lightweight materials into their construction, stability remains a distinct and defining feature of their hull design. The shallow draft is also a beneficial characteristic for various boating scenarios but does not directly epitomize the essence of what distinguishes a catamaran hull. Therefore, the stability provided by the dual hulls is the most defining characteristic of a catamaran, making it the correct answer.