Explanation:

- The term "Fourth Estate" is used to refer to the press or journalism.

- Option 1: Press – This is correct. The press acts as a guardian of public interest, often holding those in power accountable.

- Option 2: Parliament – This represents the legislative branch of government. It is one of the traditional three estates.

- Option 3: Executive – This refers to the branch of government responsible for implementing and enforcing laws.

- Option 4: None of the above – This option is incorrect since the Fourth Estate specifically denotes the press.