Explanation:

- Parliament (Option 4): Often referred to as "the temple of the country's democracy," the Parliament is where elected representatives gather to discuss, debate, and make national laws. It symbolizes democratic governance and the representation of the people's will.

- Raj Ghat (Option 1): This is a memorial dedicated to Mahatma Gandhi in Delhi. It is not directly related to the country's democratic institutions but is a place of historical and cultural significance.

- Supreme Court (Option 2): As the highest judicial body, it upholds the Constitution and ensures justice. While pivotal in interpreting laws, it is not termed as the "temple" of democracy.

- Ashok Pillar (Option 3): This structure is an ancient pillar erected by Emperor Ashoka, often seen as a symbol of India's rich history but not connected to democratic governance.

Correct Answer: Parliament (Option 4)