A unicameral parliament is a legislative body that consists of a single chamber or house. This means that all members of the parliament work together in one assembly to create, amend, and pass laws. Countries with unicameral systems often argue that this structure simplifies the legislative process and makes it more efficient. Many nations, such as Sweden and New Zealand, have adopted unicameral parliaments. This system contrasts with bicameral parliaments, which have two separate chambers, like the United States Congress. Unicameral parliaments can lead to quicker decision-making and clearer accountability, as there is only one body responsible for legislation.