The correct answer is: C. Buckle : Belt
A clasp is a device that fastens or closes something, such as a bracelet. A buckle is a device that fastens or closes something, such as a belt. Both a clasp and a buckle are used to fasten or close something, and they are both typically made of metal.
A wrist is the part of the human body where the hand and arm meet. A watch is a device that tells the time. A wristwatch is a type of watch that is worn on the wrist.
A cuff is the part of a sleeve that is turned back or folded down. Trousers are a type of pants that are worn by men. A trouser cuff is the part of a trouser leg that is turned back or folded down.
A hook is a curved piece of metal or other material that is used to catch or hold something. A coat is a piece of clothing that is worn over the body. A coat hook is a device that is used to hang coats on.
In conclusion, the correct answer is C. Buckle : Belt because both a clasp and a buckle are used to fasten or close something, and they are both typically made of metal.