Final answer:
The Scrum Master role is responsible for blocking distractions and removing impediments in a Scrum team to facilitate effective and focused progress.
Step-by-step explanation:
The role responsible for blocking distractions and removing impediments is the Scrum Master. In a Scrum team, the Scrum Master works to ensure that the Development Team can work effectively by addressing any barriers that may obstruct their progress, including minimizing disruptions. Although changing the physical background, as mentioned, is a technique used in photography to remove distractions, the concept parallels the Scrum Master's responsibility in a metaphorical sense, where distractions in a work environment need to be managed effectively for better focus and productivity.