Answer:
Inside the nucleus of a cell!
Step-by-step explanation:
Think of the nucleus as the brain of the cell, so where are the neutrons located in the human body? The brain! This is because the brain or nucleus needs the energy which comes from neutrons, electrons, and protons, to do its job.
Hope this helps! :)
(I'm not the best at describing this, but I hope this will still help you!)