The "Red Data Book" is a list of rare plants, animals, fungi and other organisms that are considered to be at maximum risk of extinction. It contains information on the status, distribution, and conservation of these species. Through the Red Data book, the conservation needs of these organisms are understood and necessary steps are planned for their protection.

Answer: A) Chloroplasts Explanation: Chloroplasts contains chlorophyll, the green substance in plants that allows them to create food from carbon dioxide and water called as photosynthesis.

1. All the houses of the Sunari civilization are built with the oldest iron ore melting furnaces.

2. Sunari civilization belongs to the Iron Age.

3. Sunari is a small village in Jhunjhunu district of Rajasthan.

4. It is situated near the Kantil river bank.

5. People of Sunari civilization mostly used rice and horses which is considered as Arya Vedic culture.