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What is the main factor that prevents the growth of tropical plants in the northern part of the United States?

A) Predators
B) Overpopulation
C) Pollutants
D) Climate

User Mike Polen
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2 Answers

1 vote
It would be D Climate because tropical plants need warmth and humidity they have to be in almost the same temperature all year long
User Stamatia
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6 votes
I would say D but overall it would actually be all of the above :)
User Luis
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