Explanation:

- Lok Sabha:

- This is the lower house of India's Parliament.

- Members are directly elected by the public.

- Cannot be abolished; it is essential for the central legislative process.

- Rajya Sabha:

- This is the upper house of India's Parliament.

- Members are elected by the state legislatures.

- Cannot be abolished; it plays a crucial role in federal legislative function.

- Vidhan Parishad:

- This is the legislative council in some states.

- It is the upper house at the state level.

- Can be abolished by the state legislature with approval from the Parliament.

- Vidhan Sabha:

- This is the legislative assembly in states.

- Members are directly elected by the state's people.

- Cannot be abolished; it is necessary for state governance.