Vibrant opposition parties in parliament help to strengthen democracy. This is because they provide an alternative voice and check to the ruling party, ensuring that government actions and policies are debated and scrutinized. This promotes transparency and accountability in governance, as the ruling party is held responsible for its actions. Opposition parties also serve as a mechanism for representing the diverse interests of citizens who may not be represented in the ruling party. Additionally, opposition parties provide a platform for citizens to express their grievances and concerns, which can be addressed through policy-making and implementation. All these contribute to strengthening democracy and ensuring that the interests of citizens are protected.