Which of the following best describes independent data marts?

Independent data marts are best described as isolated entities with independent data. This means that they are standalone systems designed to serve the analytical needs of a specific department or business unit without relying on data from an enterprise data warehouse. By being independent, these data marts allow individual departments to manage their data and analytics processes autonomously, often responding quickly to their specific needs.

In contrast, the other descriptions do not accurately capture the essence of independent data marts. They do not generate consistent data across the organization; rather, they might contain varied data definitions and structures given their isolated nature. Additionally, they are not derived from an enterprise warehouse since they operate independently of one another. While they can integrate data from specific sources relevant to their function, the defining feature is their autonomy and lack of dependence on centralized data governance or structures provided by an enterprise warehouse.