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Across
  1. 7. are environmental conditions that keep a population from increasing in size and help balance ecosystems
  2. 8. group of organisms that have certain characteristics in common and are able to interbreed
  3. 9. when its population is so low that it is nearly extinct
  4. 10. refers to the disappearance of an entire species from earth
Down
  1. 1. the major cause of wildlife depletion
  2. 2. variety of wildlife in an area
  3. 3. if a species is no longer found in the area it once inhabited but still found elsewhere in the wild
  4. 4. if a species remains alive in captivity or in other human controlled situations
  5. 5. process by which a body of water becomes enriched in dissolved nutrients
  6. 6. clearing or removing of a forest to include cutting of all tress mostly for urban use