What does the term "static line" refer to in firefighting?

The term "static line" refers specifically to a type of rope that does not stretch, making it particularly advantageous for applications where secure connections are essential. Such ropes provide reliable support for securing personnel and equipment during various firefighting operations, including rappelling or lowering tasks. The lack of elasticity in a static line ensures that any weight applied will not cause significant movement or shock loading, which is critical for maintaining stability and safety when lives are at stake.

In contrast, options mentioning stretching ropes, flexible lines, or perimeter control do not accurately define a static line's characteristics and intended uses. The nature of static lines as non-stretching is fundamental in ensuring safety and precision during rescue operations, thus solidifying "B" as the correct interpretation of the term in the context of firefighting.