What is the function of a "strut"?

The term "strut" refers specifically to a structural element that serves as a brace to resist compression. In engineering and construction, struts provide support and stability to a structure, allowing it to withstand compressive forces and maintain its shape. They are essential components in various frameworks, such as bridges and buildings, where they help distribute loads and enhance overall structural integrity.

In contrast, the other options do not align with the definition of a strut. For instance, an opening made forcibly pertains to a breach or gap rather than a structural component. Steeping in a liquid refers to immersing substances in a fluid, such as when brewing tea or infusing flavors, which does not connect to the concept of support or stability as a strut does. Lastly, the method of crossing a river suggests navigating or traversing bodies of water, which is unrelated to the structural role that a strut fulfills. Thus, the function of a strut as a brace used to resist compression is clearly defined and distinct from the meanings of the other choices.