Unicameral is the word that you would be looking for
The best option from the list would be that "<span>A flat tax taxes all taxpayers at the same percentage," since this is in contrast to a "progressive tax," which taxes people with different incomes at different percentages. </span>
Labor Union is an organized association of workers, often in a trade or profession, formed to protect and further their rights and interests.
Answer:
The Code of Chivalry was a moral system which went beyond rules of combat and introduced the concept of Chivalrous conduct - qualities idealized by the Medieval knights such as bravery, courtesy, honor and great gallantry toward women. ... The Code of Chivalry was the honor code of the knight.