Final answer:
The Scrum Master is responsible for removing impediments to protect the team and ensure efficiency.
Step-by-step explanation:
One responsibility of the Scrum Master is to remove impediments in order to help protect the team. This role is essential in the Scrum framework as it ensures that the team can work efficiently and productively without unnecessary roadblocks. The Scrum Master is not responsible for prioritizing the Team's Backlog, defining tasks and assigning owners, or facilitating the PI Planning session - these responsibilities fall to the Product Owner and other roles within the Agile framework.