What characterizes a feedback system?

A feedback system is characterized by its ability to adjust based on its output. This means that the system continuously monitors its own performance and makes necessary adjustments to maintain optimal operation or to achieve desired outcomes. When a feedback system produces an output, it evaluates the efficacy of that output and, based on this evaluation, it alters its inputs or processes to improve performance. This adaptive capability is essential for regulating systems, ensuring they can respond effectively to changes in the environment or to internal conditions.

In contrast, feedback systems rely on data from their outputs to inform ongoing adjustments, thereby fostering a dynamic interaction between the system and its environment. The other options fail to capture this critical aspect, either by suggesting methods that lack adaptability or by implying a lack of communication within the system.