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Across
  1. 2. a relationship in which both organisms benefit
  2. 4. a group of people who live in the same area (such as a city, town, or neighborhood)
  3. 7. leaving one population for another
  4. 9. a group of people or animals of a particular kind that live in a place
  5. 10. the process by which a green plant turns water and carbon dioxide into food when the plant is exposed to light
Down
  1. 1. when organisms come and stay in a destructed area
  2. 3. an intimate association between organisms of two or more kinds; especially : one in which a parasite obtains benefits from a host which it usually injures
  3. 5. a relation between two kinds of organisms in which one obtains food or other benefits from the other without damaging or benefiting it
  4. 6. to come to a country to live there
  5. 8. a change in a plant or animal that makes it better able to live in a particular place or situation