Final answer:
The correct choice is para because it indicates the intended function or purpose of the girl being timid.
Step-by-step explanation:
In this sentence, the correct choice is para.
When describing someone's personality or characteristics, we use para to indicate purpose or intended function.
For example, in this sentence, the purpose or function of the girl being timid is to show that she is very extroverted. Therefore, we use para to express this relationship.
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