I believe the answer would be Bill Gates. An appositive is a noun that renames a noun right beside it. In this case, "Bill Gates" is renaming "One of the richest men in the world."
Answer:
He bought a washing machine
Explanation:
__________
Answer: citizens choose other persons to carry out government for them
Explanation: The citizens of a representative democracy do not vote on every issue. They elect city council members, state legislators, senators and congress representatives to make laws and and spending policies.