The correct answer is option 4: All of the above. Grassroots democracy refers to empowering local communities and individuals to participate in decision-making processes. Devolution of powers is the transfer of authority and responsibility from the central government to regional or local governments. Decentralization of powers refers to the distribution of powers and responsibilities across various levels of government. Panchayati Raj system is a decentralized system of local self-governance in India, where power is devolved to elected village councils. Therefore, all of these options - devolution of powers, decentralization of powers, and Panchayati Raj system - are related to grassroots democracy, as they all involve empowering local communities and individuals in decision-making processes.