Animal Kingdom

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Across
  1. 4. - Arid region with little vegetation
  2. 6. - Wide-open area covered in grass
  3. 7. - Natural underground hollows
  4. 9. - Ridge of rock or coral at or near the surface of the sea
  5. 11. - Extremely cold region around the North Pole
  6. 12. - Vast body of saltwater
  7. 13. - Area where a river meets the sea
  8. 17. - High, elevated land with steep slopes
Down
  1. 1. - Area of land saturated with water
  2. 2. - Dense, tropical forest with lush vegetation
  3. 3. - Wetland area with shallow water
  4. 5. - Wetland with standing water
  5. 8. - Tropical grassland with scattered trees
  6. 10. - Dense area populated with trees
  7. 14. - Cold, treeless plain
  8. 15. - Flowing body of water
  9. 16. - Underwater ecosystem formed by colonies of tiny animals