What does the term "bicameral" refer to?

The term "bicameral" specifically refers to a legislative system that consists of two chambers or houses. This structure is commonly found in many democratic governments around the world, including the United States, which has the House of Representatives and the Senate.

A bicameral legislature allows for a system of checks and balances within the legislative process, as each chamber can provide different perspectives and represent different constituencies or interests. This can lead to more thorough deliberations on proposed laws and an opportunity for additional debate before legislation is passed.

In contrast, the other options describe different concepts: having three legislative branches refers to a tripartite system, an electoral system does not directly relate to the structure of a legislature, and decentralization pertains to governance and the distribution of authority, which is a different aspect of political organization.