Which type of surveillance system is characterized as flexible and modular?

The choice indicating that the surveillance system is flexible and modular for discreet surveillance reflects the adaptability and customization potential of certain advanced surveillance systems. These systems are designed to be configured in various arrangements or tailored to meet specific monitoring needs, allowing for easy integration of different components, such as cameras, sensors, and other technologies.

The emphasis on flexibility means that users can modify and expand the system as requirements change without significant overhauls or replacements. The modular nature suggests that individual components can be adjusted based on the surveillance environment, making it possible to create a discreet setup that minimizes visibility while maintaining effectiveness. This approach is particularly useful in applications where retaining a low profile is necessary, such as in retail stores, public places, or residential areas.

In contrast, other types of cameras like fixed dome cameras, PTZ cameras, and bullet cameras each have their own specific features and use cases. While they serve as effective surveillance tools, they do not inherently possess the same level of flexibility and modular design that is characteristic of the option that highlights discreet surveillance solutions. Hence, the selected answer appropriately represents a surveillance system that prioritizes adaptability and confidentiality.