Explanation:

- Habeas Corpus:

- This writ is indeed a bulwark of personal freedom.

- It is called the "Great Writ" because it safeguards individuals from unlawful detention.

- Ensures that a person in custody is brought to court to determine the legality of their detention.

- Certiorari:

- A writ issued by a higher court directing a lower court to send records for review.

- Ensures judicial oversight without directly affecting personal freedom.

- Mandamus:

- Commands a public authority to perform a duty mandated by law.

- Does not directly address personal freedom.

- Quo Warranto:

- Challenges a person's right to hold a public office.

- Not directly related to personal freedom.