Which of the following tools help to understand which part of the test object has...

Comprehensive and Detailed Explanation From Exact Extract of ISTQB Certified Tester Advanced Level – Test Manager v3.0 syllabus:

UnderTest Tool and Automation, the syllabus explains thatcoverage tools(often calledcode coverage tools) measurewhich parts of the code or structure(e.g., statements, branches, conditions) have beenexecuted by tests. This directly answers the question about “which part of the test object has been exercised.”

Amanages requirements and traceability, not execution coverage.

Bexecutes tests but typically does not measure structural coverage of the code by itself.

Canalyzes code without executing it; it identifies defects or coding standard violations, not runtime coverage.Relevant syllabus areas:Test Tool and Automation—Coverage measurement tools(structural coverage for assessing extent of code exercised by testing).