What is the specific purpose of introducing Panchayati Raj governance?

The correct option is: To ensure direct grassroot democracy.

Detailed Explanation:
The Panchayati Raj System was introduced in India to promote democratic decentralization, moving the power of governance from centralized authorities down to the local levels. The specific and primary purpose of this system is to ensure direct grassroot democracy by enabling the participation of local communities in the decision-making and developmental processes.

Key aspects of why this is the primary purpose include:
1. Democratic Decentralization: It shifts administrative and financial powers to local bodies (Gram Panchayats at the village level, Panchayat Samitis at the block level, and Zilla Parishads at the district level).
2. Direct Participation: Through institutions like the Gram Sabha (which consists of all registered voters in a village), local citizens can directly voice their concerns, approve development plans, and hold local representatives accountable.
3. Self-Governance: It empowers ordinary citizens at the local level to manage their own affairs, ensuring that governance is tailored to the specific needs of the community rather than relying solely on top-down state or federal directives.