Concept:Prorogation is the formal end of a parliamentary session by royal authority.Explanation:A session of parliament is a period during which the legislature meets.Bringing that session to an end through a royal proclamation is called prorogation.Dissolution ends the entire life of a parliament, not just a single session.Vote of no confidence and political impasse do not match this definition.Thus, the correct term is prorogation of parliament.Answer:D. prorogation of parliament