Hugo has learned to fear the bell on his phone because every time the phone rings, a prank caller starts shouting at him. he now finds himself fearful of other bells, like bicycle bells and doorbells. hugo is affected by stimulus

Hugo is affected by stimulus "generalization".

In the conditioning process, stimulus generalization is the propensity for the adapted boost to summon comparable reactions after the reaction has been adapted. For instance, if a child has been molded to fear a stuffed white rabbit, it will display dread of articles like the adapted boost, for example, a white toy rodent.  

Stimulus generalization can likewise clarify why the dread of a specific protest frequently influences numerous comparable items.  

answer; genetics;