Concept:Minority parties in parliament serve as the opposition to keep the ruling majority answerable.
Explanation:Minority parties do not simply oppose every government action.
Their main duty is to question policies, present alternative views, and check the power of the majority party.
This process promotes accountability and protects the interests of the people.
By doing so, they make the political system more balanced and representative.
Thus, their overall role is to sustain democratic governance.
Answer:B. ensure democratic governance