What type of architectural structure is characterized as a stretched membrane?

The correct identification of a stretched membrane structure is a canopy. A canopy typically consists of a lightweight, flexible material, often fabric or a similar membrane, tensioned between supports to create a covering or shelter. This design allows for ease of installation and adaptability to various shapes and sizes, making it suitable for outdoor spaces, exhibitions, and temporary structures.

In contrast, an arch, dome, and vault are primarily rigid structures. An arch relies on compressive forces to maintain stability, while a dome is a three-dimensional curved surface that provides enclosure. A vault is an extended arch that forms an overhead space. Though these structures can incorporate materials that may have some flexibility, they do not typically exemplify the principles of a stretched membrane in the way that a canopy does. Understanding these distinctions helps in recognizing various architectural forms and their structural characteristics.