What is the upper house and who does it consists of how many members?

The upper house of a legislature is typically a chamber that reviews legislation proposed by the lower house and represents specific interests, regions, or populations. In the United States, for example, the upper house is the Senate, which consists of 100 members, with two senators representing each state. Other countries may have different structures for their upper houses, such as the House of Lords in the UK, which includes appointed members, bishops, and hereditary peers. The specific composition and number of members can vary significantly depending on the country's political system.