Final answer:
Under Responsible Government, the structure of parliamentary democracy evolved to include executive leaders like the prime minister and cabinet from the majority party in the legislature. These changes emphasized accountability to the legislature without altering the fundamental structure of government.
Step-by-step explanation:
The change in parliamentary structure made under Responsible Government relates to the transition towards a parliamentary democracy. This evolution reflects a change where the executive branch, including the prime minister and the cabinet, are drawn from the majority party or coalition in the legislature. These leaders are also held accountable to the legislature.
As a new government forms within an existing parliamentary structure, it does not necessitate fundamental changes to the structure itself, as seen in the formation of administrations in countries like the USA. However, incremental reforms and events, such as the redistribution of seats in the House of Commons and the codification of electoral processes, have shaped modern parliamentary systems.
The introduction of elected representative bodies across Europe by the late 19th century, the acceptance of written constitutions, and the organization of parliamentary bodies to represent the various classes of society were all critical steps in the transition to Responsible Government and more liberal politics.