Final answer:
The Scrum Master is responsible for tracking release progress by updating the release burndown chart.
Step-by-step explanation:
The role that tracks release progress by updating the release burndown is the Scrum Master. The Scrum Master is responsible for overseeing the scrum process and ensuring that it is being followed correctly. They work closely with the development team and facilitate communication between the team and other stakeholders.
The release burndown chart is a visual representation of the work remaining in a release. It shows the amount of work left to be completed over time. As the work is completed, the chart should ideally show a steady decrease in the remaining work.
Other roles mentioned in the options, such as the Product Owner, Development Team, and Stakeholder, are important in the scrum framework but are not specifically responsible for tracking release progress through the release burndown.