You are the project manager for your organization and you are working with Thomas, a project team member. You and Thomas have been working on a specific risk response for a probable risk event in…

A risk expeditor is not a standard PMI role and does not describe someone with full ownership and control over a specific risk response plan.

A risk owner is a project team member formally empowered to manage and control all aspects of a specific identified risk response, including implementing the response plan if the risk materializes. This role includes decision-making authority over the risk and accountability for its outcomes, which matches Thomas's described responsibilities exactly.

Risk team leader is not a recognized PMI designation in risk management; ownership of a specific risk is assigned through the risk owner role.

Risk coordinator is not a standard PMI role for someone empowered with full authority over a specific risk response.