Which entity is a defect directly linked to bye default if a defect was raised during a manual test run?

When a defect is raised during a manual test run in Quality Center, it is directly linked to the specific Test Step that failed. This provides traceability from the defect to the exact step in the test case where the issue was detected. The defect is not directly linked to the Test (test case), Test Run (the execution instance), or Test Set (the collection of tests). The Test Step linkage allows precise identification of where in the test flow the defect occurred.