Concept:A state is recognised by four essential attributes: population, territory, government, and sovereignty.
Explanation:These four attributes are the essential features of a state.
Population and territory form the physical basis of the state.
Government and sovereignty form its legal and political basis.
Common language is not an essential attribute of a state.
Many states exist where citizens speak different languages.
Therefore, common language does not qualify as a necessary feature of a state.
Answer:D. Common language