Final answer:
Updating sets of requirements falls under the activity of change control, which is crucial to managing project changes. This ensures systematic changes to the project's scope, including documents and requirements.
Step-by-step explanation:
Updating sets of requirements is an activity of change control. Change control is a part of project management that involves introducing and approving changes to the project's scope, including documents such as requirements. It ensures that project changes are introduced systematically and efficiently, and it helps to manage the state of project artifacts such as requirements.
Requirements status tracking is the ongoing recording of the progress of each requirement. Requirements tracing involves following the life of a requirement both forwards and backwards (i.e., from its origins, through its development and specification, to its subsequent deployment and use, and through periods of ongoing refinement and iteration in any of these phases). Version control is the management of multiple versions of a set of information, which is commonly used for source code management in software development.