If you were to develop a rare condition in which you were not able to remember to be afraid of certain situations, animals, or events, which part of the brain would most likely be damaged?

amygdala

Explanation:

Based on the information provided within the question it can be said that the part of the brain most likely damaged would be the amygdala. This is the part of the brain that is responsible for emotions, survival instincts, and memory. Therefore if you are not afraid of certain situations, animals, or events it is because your survival instincts for those situations are not working properly, therefore there is something wrong with the amygdala.