Which of the following words is closest in meaning to “Bluff”?

Bluff means a steep cliff.

• Correct answer - cliff: it has the same meaning as Bluff.
• plateau: a flat raised area of land - wrong, it does not mean the same as Bluff.
• valley: a low area between hills - wrong, it does not mean the same as Bluff.
• rocky island: a small island of rock - wrong, it does not mean the same as Bluff.