Pearl's father is worried about pearl and JBIII walking to school by themselves. This inference can be drawn about this because he has only let Pearl walk by herself twice.
Inference refers to a logical conclusion that one arrives at by examining strong evidence.
In literature, the evidence may come from facts that can be found in the text. Hence, from the text, we can conclude that Pearl's father is worried because Pearl is inexperienced at walking to school by herself.
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