Correct Answer: Butler

Solution : The correct choice is the fourth option.

A valet is a personal attendant or servant, often responsible for the care and maintenance of the clothing and personal belongings of a person. Butler is a senior servant in charge of the household and is responsible for managing other domestic staff.

The meanings of the other options are:

• Carrier: A carrier can refer to a person or thing that carries or transports something.
• Carrousel: It can refer to a rotating conveyor belt at an airport for handling luggage or a revolving circular platform with seats for amusement rides.
• Kingpin: It can refer to a central or essential person or thing, often used informally to describe a leader or key figure.

Therefore, the right answer is butler.