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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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kay20213 kay20213
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6 years ago
The decline in approximately 70 of the world's bird species is particularly alarming to scientists because
 
  a. This is the first time any bird species have been threatened with declining numbers.
  b. It is not caused by any human activities that scientists can determine.
  c. Only land birds are affected, while water birds seem to be maintaining normal population numbers.
  d. Birds are excellent environmental indicators.
  e. Birdwatching now generates a significant portion of tourist dollars in some countries.
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ztboyceztboyce
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6 years ago
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kaytee23
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6 years ago
Brilliant ツ
TheMoffattMan
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Yesterday
Just got PERFECT on my quiz
hannahspillett
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2 hours ago
Thanks
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