Answer:
1. State Government - Derives power from the people.
State governments are in care of serving the people's interest, and people have the right to change the government if they feel that the state government is not doing so.
2. National Government - Derives power from the people. Sovereign over the country.
Same as above, the national (or federal) government derives its power from the consent of the governed. The difference lies in the territorial scope of the jurisdiction: state governments rule within state boundaries, while the federal government governs the whole country.
3. Local Government - Derives power from the state government.
Local governments are a form of devolved government. They vary in nature according to state law, and are considered part of the state government.