Which one of the following is a Scrum artifact?

The Product Backlog is indeed a Scrum artifact because it serves as a vital component in the Scrum framework. It is an ordered list of everything that might be needed in the product, providing a single source of truth for the work to be done. The Product Backlog evolves as new requirements emerge or priorities change, and it is maintained by the Product Owner, who ensures that it reflects the current understanding of what is necessary for the product.

Artifacts in Scrum provide transparency and allow for the inspection and adaptation of a project. The Product Backlog, along with the other artifacts like the Sprint Backlog and the Increment, helps teams assess progress and value delivery effectively throughout the development process. This makes it a foundational element of how Scrum teams manage their work and communicate progress to stakeholders.

In contrast, the other options such as team performance metrics, management reports, and daily summaries do not fit the definition of Scrum artifacts. While they may be valuable tools for tracking progress or communicating updates, they do not hold the same formal status within the Scrum framework as the Product Backlog does.