Across
- 4. The lunges of the Earth
- 5. Mother earth
- 7. The Nile,The Ganga,The Kaveri
- 9. A complex relationship between all the living and non-living things
- 10. They are made up hundreds to thousands of tiny creatures called polyps
Down
- 1. large floating mass of ice
- 2. protected areas for conservation of wildlife
- 3. A wild carnivorous mammal which is the largest member of the dog family
- 6. The color of gold
- 8. The natural engineers of river dams