unlock3 u1

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Across
  1. 2. a friendly sea animal that can swim fast
  2. 3. to stay alive in difficult conditions
  3. 4. the land along the edge of a sea or lake
  4. 7. to work together with others
  5. 9. an illness that makes living things unwell
  6. 12. large and very important
  7. 14. not allowed by law
  8. 15. to hurt a person or animal
  9. 17. no longer living on the earth
  10. 18. made by nature, not by people
  11. 19. a group of similar animals or plants
Down
  1. 1. the natural home of an animal or plant
  2. 2. to break or ruin something completely
  3. 5. to catch an animal and stop it from leaving
  4. 6. the way a person or animal acts
  5. 8. living naturally in a place
  6. 10. to make water, air or earth dirty
  7. 11. to keep someone or something safe from harm
  8. 13. to cause a change to someone or something
  9. 16. animals that may soon disappear from the world