Parasympathetic activation would _________ heart rate while sympathetic activation would ______ heart rate.

Okay, so this question is basically asking what effect the parasympathetic and sympathetic divisions would have on heart rate. So if our sympathetic division is basically our fight or flight response, is basically preparing our body to engage with the stimulus, getting us kind of fired up and ready to go, it's going to be increasing our heart rate, right, and if that parasympathetic nervous system is focusing on you know rest and digest, helping us to relax, and kind of get food moving through us, get back to homeostasis, that's probably going to kind of slow our heart rate down a little bit, right? So the parasympathetic nervous system would decrease heart rate while the sympathetic nervous system would increase heart rate. So our answer here is d, and there you go.