Group of three

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Across
  1. 5. An area for keeping animals
  2. 7. Zebra crossing
  3. 8. Something living in other body for survive
  4. 10. No rain and water for long period
  5. 11. the structure of body
  6. 12. A kind of animal hunting other animal for foods
  7. 14. Classify as a ship
  8. 15. Small bush
  9. 17. Water way surround castle
  10. 18. a shine around a rink
Down
  1. 1. Natural fertilizer
  2. 2. It is a land that plant one kind of fruit
  3. 3. Related to the moon
  4. 4. Flower leaf
  5. 6. Study about human
  6. 7. Animals have wings
  7. 9. Land area
  8. 12. Rhythm of heart rate
  9. 13. Fertilized eggs
  10. 16. General study about plants