How do apes learn human language??

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Across
  1. 4. About language.
  2. 6. An ape with orange hair that lives in trees in forests.
  3. 7. The structure of language.
  4. 9. A picture representing something.
  5. 10. The closest animal related to human race.
Down
  1. 1. The workings of the brain.
  2. 2. Feelings not just things.
  3. 3. An ape related to the Chimpanzee ape, but smaller.
  4. 5. Two things mixed to make something even better.
  5. 8. A chart with pictures and words.