Final answer:
In Scrum, the Scrum Product Owner is responsible for maximizing the return on investment by prioritizing tasks and aligning the team's work with stakeholder goals.
Step-by-step explanation:
The individual responsible for maximizing the return on investment (ROI) in a Scrum framework is the Scrum Product Owner. The Scrum Product Owner's role is specifically aimed at ensuring the product delivers value to the business. They are in charge of the product backlog, prioritize tasks based on business value, and make sure the team's work aligns with the stakeholders' goals. While aspects of ROI may be influenced by different roles, such as the Scrum Master facilitating processes and the Scrum Team working on delivering a high-quality product, the Product Owner holds the accountability for the economic viability of the product development effort.