Answer:Spontaneous recovery
Step-by-step explanation:
Spontaneous recovery is a resurfacing of a behavior that was believed to have been extinct.This is explained through operant and classical conditioning.
A conditioned response comes back after a significant period when it was gone. A conditioned stimulus and unconditioned stimulus are brought back when the girl is going back to school, school is associated with this bully and going back to school triggers the conditioned response from the conditioned stimulus which is school.