Final answer:
A whistleblower is the disclosure of confidential information by a government official to the news media, protected by reporter's privilege.
Step-by-step explanation:
A whistleblower is the disclosure of confidential information by a government official to the news media. This practice, sometimes referred to as reporter's privilege, protects the anonymity of sources and prevents government prosecution. Journalists have the right to keep their sources confidential to promote transparency and prompt investigations into questionable government practices.