Multiple Choice
Ecologists often build models to depict the relationships between organisms. In such models, an arrow is used to link two organisms in a relationship. The arrowhead is next to the organism that is affected. If the effect is positive, the arrow is labeled with (+) , and if negative, then the label is (-) . Which of the following models best illustrates the relationship of the Brazil nut tree and the other organisms associated with it?
A) 
B) 
C) 
D) 
Correct Answer:

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Correct Answer:
Verified
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