Which statement describes the action of changing existing systems in AWS operations?

The correct choice pertains to the concept of configuration management, which involves maintaining and managing the settings and parameters of systems to ensure they operate as intended. This includes making adjustments, updates, or changes to existing infrastructure components to improve efficiency, support new functionality, or address issues.

Configuration management ensures that changes are systematic, repeatable, and traceable. This means that any modifications made to the existing systems can be tracked and controlled, thereby reducing the chances of disruption or failure during upgrades or maintenance.

In contrast, deployment refers to the process of releasing new applications or software updates into the live environment, while refactoring typically involves rewriting existing code to improve its structure or readability without changing its external behavior. Monitoring focuses on tracking the performance and health of systems rather than altering them. Thus, configuration management most accurately describes the action of changing existing systems in AWS operations.