Which of the following is a stiff fabric commonly used to line stage costumes?

Buckram is recognized as a stiff fabric often used in the theater and costume design industry primarily for lining stage costumes and for creating structural elements in hats. Its stiffness enables it to hold shapes well, making it ideal for creating a foundation for costumes that need to maintain a specific silhouette or support certain design features.

In the context of costume design, buckram serves not just a practical function, but also aids in the overall aesthetic by providing a clean and neat finish. It is typically made from cotton or a blended material, which adds to its durability and versatility in various applications within stage production.

While other fabrics like muslin, silk, and taffeta have their uses in costume design, they do not possess the same structural qualities that buckram offers. Muslin is more commonly used as a lightweight fabric for mock-ups or linings, silk is prized for its luxurious feel and drape, and taffeta is known for its crispness and sheen but lacks the required stiffness for costuming support.