Answer:
amygdala
Step-by-step explanation:
The amygdala, a small but important portion of the brain, is involved in producing a response to fear and other negative emotions. For this reason, we can say that if Vanessa is having difficulty responding to unpleasant stimuli, she has probably damaged the amygdala.
The amygdala is fundamental to the self-preservation of the species as it is the identifying center of danger, generating fear and anxiety and putting the animal on alert, ready to evade or fight.