You can get obese and than u would become lazy
I believe the answer your looking for is the "frontal" lobe, though this is if you just want the lobe of the brain. The frontal lobe is responsible for giving the traits that define our personality and who we are are. If you want to be specific though it is, I think the "Amydalga" is the more specific answer
Some parents beast feed longer then other parents and that has a big effect because they get used to it
