1. A) during any portion of a year
  2. B) Marshall et al. (2003) proposed that food and protection from predators are two major reasons for birds to use disturbed habitats in some periods.
  3. A) Because arthropod populations influence birds’ habitat type.
  4. A) related to birds
  5. B) to propose research hypothesis
Para 1 Many bird species including those of early successional habitats and those of small tree-fall gaps within mature forest select disturbed habitats during some portion of the year Hunter et al 20

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