Fear and anger are basic negative emotions with an evolutionary basis involving the amygdala and hypothalamus, triggered by perceived threats.

“fear and anger of course have to do with threat and they they they involve the amydala of the brain you know when a car is about to run you over and you're a pedestrian in a crosswalk that crosses your visual cortex and is recorded by the in the occipital lobe of your brain as as an enormous Predator that signals to your to your amydala to send you know the signal through the hypothalamus of your brain to your pituitary glands which signals your adrenal glands above your kidneys to spit out stress hormones”