Which of the following best defines the term 'nation' in a political science context?

The term 'nation' in a political science context is best defined as a group of people bound by a common language and culture. This definition highlights the significance of shared identity among individuals, which often includes aspects such as language, customs, history, and cultural heritage. The concept of a nation is closely tied to the notion of national identity, where people identify themselves with a larger community beyond just geographic or political boundaries.

While the other options touch on different aspects of political organization, they do not fully capture the essence of what constitutes a nation. A democratic assembly refers to a political structure rather than the cultural and social bonds of the people. A territory governed by legal treaties emphasizes the legalistic aspect of governance but overlooks the importance of the people who comprise a nation. Similarly, a unified group sharing ideological beliefs may describe a political movement or organization rather than the broader, more encompassing characteristics that define a nation, which is fundamentally about shared cultural identity. Thus, focusing on language and culture provides a clearer understanding of what a nation is in the political science landscape.