Why is natural language explanation of COBOL programs particularly valuable in a modernization project?

Think of it like working hands-on with IBM mainframe systems — the answer here is 'It allows z/OS to execute COBOL programs without recompiling after any change'. Natural language explanations bridge the knowledge gap for Java developers who must understand, validate, and maintain transformed code but lack deep COBOL expertise. On real mainframe exams, this concept comes up repeatedly so make sure you have it locked in.