Process owners are the best suited to help a risk practitioner understand the impact of IT-related events on business objectives, as they have the responsibility and authority over the design, execution, and performance of business processes. Process owners are also accountable for the risks and controls associated with their processes, and they can provide valuable input and feedback on the likelihood and impact of IT-related events on the process outcomes and objectives.
The other options are not the best suited to help a risk practitioner understand the impact of IT-related events on business objectives. IT management is responsible for the delivery and support of IT services and solutions, but they may not have the full visibility or understanding of the business objectives and processes.
Internal audit is responsible for providing independent and objective assurance and consulting services on the effectiveness and efficiency of governance, risk management, and control processes, but they may not have the direct involvement or influence on the business objectives and processes. Senior management is responsible for settingthe strategic direction and objectives of the organization, but they maynot have the detailed knowledge or experience of the business processes and their risks and controls. References = IT Risk Manager: Skills and Roles & Responsibilities, IT Risk Resources | ISACA, Managing information technology risk | Business Queensland