What is a common feature of portable fire fighting systems?

Portable fire fighting systems are designed to be easily moved from one location to another, which is why the ability to be relocated as needed is a defining characteristic. These systems offer flexibility to respond to fires in various environments, whether they are indoors, outdoors, or at different job sites.

In contrast, options that suggest these systems are fixed in one location or limited to one size and type do not align with the fundamental purpose of portable systems, which is versatility and adaptability. Additionally, requiring extensive installation contradicts the concept of portability, as these systems should be quick and easy to deploy without major infrastructure modifications. Therefore, the ability to relocate them enhances their utility in various firefighting situations.