Understanding service relationships is critical for effective release management, especially to assess the impact of releases. TheITIL® 4 Practitioner: Release Managementdocument states:"Enterprise architecture tools help release managers understand the relationships between services, applications, and infrastructure, enabling better impact analysis and dependency mapping for releases"(Section 4.2).

Option A (Analysis and reporting tools) focuses on performance metrics, not service relationships.

Option B (Work planning and prioritization tools) aids in scheduling, not understanding service dependencies.

Option C (Monitoring and event management tools) is used for real-time performancetracking, not structural relationships.

Option D (Enterprise architecture tools) is the correct choice, as these tools map out service relationships and dependencies, helping the release manager plan releases effectively.

The correct answer is D, as enterprise architecture tools are designed for this purpose.