building block of civilizasion

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Across
  1. 5. wanderers
  2. 6. different people perform specialized tasks
  3. 7. they started growing crops
  4. 8. to tame
  5. 9. they went all across the country and traded
Down
  1. 1. humans hunted for food and they plucked berries from bushes.
  2. 2. for the past years they started to build homes
  3. 3. an organized group of persons associated together
  4. 4. an advanced group of humans