Sianna's Puzzle

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Across
  1. 3. different species competition
  2. 6. The place that surrounds us
  3. 7. physically fit
  4. 8. number of a certain species in a area
  5. 9. same species competition
Down
  1. 1. difference
  2. 2. factory system
  3. 4. To Battle
  4. 5. inherited trait