Describe what a bill is.

A bill is accurately described as a proposed piece of legislation for debate. This definition highlights the initial stage of a bill's lifecycle, where it is introduced to a legislative body with the intention of being discussed, revised, and potentially enacted into law.

Bills serve as a method for lawmakers to present ideas for new laws or amendments to existing laws. Once a bill is introduced, it typically undergoes a series of debates, committee reviews, and votes, allowing for the opportunity to refine the proposal through discussion and amendment. The process exemplifies the democratic nature of legislative systems, where various stakeholders can contribute their views before a bill can advance through the legislative process.

In contrast, the other options do not accurately reflect the nature of a bill. A finalized law ready for enforcement refers to legislation that has already passed and has been signed into law, which is beyond the bill stage. A public opposition to a law reflects a reaction or stance taken by individuals or groups, but it does not constitute a bill itself. A government policy statement might outline general policy goals or intentions but lacks the formal framework and procedural journey associated with a bill in the legislative context.