- In a parliamentary system, the executive (Council of Ministers, headed by the Prime Minister) is part of the legislature and is collectively responsible to the lower house of the legislature (Lok Sabha in India). - This means the government remains in power only as long as it enjoys the confidence of the majority in the Lok Sabha. If the Lok Sabha passes a no-confidence motion, the government must resign. - Option A (Lok Sabha is elected directly) is a feature of a democratic system with a representative legislature, but not exclusive to a parliamentary system. - Option B (Parliament can amend the Constitution) describes a legislative power, common to many systems. - Option C (Rajya Sabha cannot be dissolved) describes the permanent nature of the upper house, which is a feature of India's bicameral legislature, but not the core principle of parliamentary executive responsibility.