Nature

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Across
  1. 2. the place or type of site where an organism or population naturally occurs.
  2. 3. A major portion of the living environment of a particular region characterized by its distinctive vegetation and maintained by local climatic conditions
  3. 4. A dynamic complex of plant, animal and micro-organism communities and their non-living environment interacting as a functional unit.
Down
  1. 1. reflects the number, variety and variability of living organisms.