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killian killian
wrote...
Silver Member
Posts: 6024
9 years ago
Although the causes of SAD remain unknown, one possibility is that _________may alter the
body’s underlying biological rhythms.
a.   seasonal changes in vegetation
b.   seasonal changes in light
c.   seasonal changes in environmental temperature
d.   season changes due to celebration of holidays
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Smiling Face with Open Mouth
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Answer accepted by topic starter
f_zah1f_zah1
wrote...
Top Poster
Posts: 10774
9 years ago
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