Final answer:
Rosa's decision to live more independently is influenced by the setting in which she grew up.
Step-by-step explanation:
The sentence that shows Rosa's decision to live more independently is influenced by the setting in which she grew up is the following:
Perhaps it was because of her early experience when as a tiny child she was taken from that so different home and left at Mrs. Boldin's, perhaps it was some fault in her own disposition, concentrated and egotistic as she was, but certainly she felt no pangs of separation, no fear of her future.
This sentence suggests that Rosa's early experience of being taken from her home and placed in a different setting may have influenced her independence and lack of fear towards her future.