Answers

2015-07-14T22:14:25+05:30
Most simply, to survive the winter, deciduous trees need to store nutrients in their roots, which means they must absorb the nutrients in their leaves. Changes in color are triggered as the trees absorb essential nutrients.
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2015-07-14T23:30:36+05:30
THEIR LEAVES CHANGES COLOR BECAUSE ITS THEIR WAY OF REPLACING OLD PARTS OF THEIR COMPOSITION TO GROW BIGGER. 
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