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Explanation:
3. "Unity in Diversity". This phrase was given by Pandit Jawaharlal Nehru.
4. A democratic system of government is a form of government in which supreme power is vested in the people and exercised by them directly or indirectly through a system of representation usually involving periodic free election.
5. What is the difference between rotation and revolution.
6. Apartheid is a policy or system of segregation or discrimination on grounds of race.
8. Earth is the only known planet of the solar system which supports life. Earth has oxygen, water and temperature. All these conditions which are supporting life, like presence of water and air in a good proportion, presence of life supporting gas and balanced temperature make earth a unique planet.
9. The first metal age is called Chalcolithic Age which existed between 2000 BC and 700 BC. (The period of human culture preliminary to the Bronze Age, characterized by the use of copper and stone tools.)
(sorry i couldnt answer other two questions. Im not from India and i dont really know the answers to those questions)
