It can be a chemical imbalance in the brain, a traumatic event, bad home life, etc.
Sorry babe i don't get your question if your question is "how does the body use food" then your answer is this (when you eat, your body breaks down all of the starches, sugars, fats, etc. from food that you eat, and uses that from the food you just ate for ENERGY so you can stay alive) so long story short your body uses food for ENERGY....but if that wasn't your question then i'm sorry i don't know
Financial goals can be hard to reach but as long as you do the prpoper research and take the proper steps you wil be able to get the answers you need
This is an example of good communication.
it just depend on the persons personality . if they are quick to anger they will express the stress through anger .if the person is more shut off the might just embrace the sadness if the person is outgoing they might call someone for help.others will just ignore it. It all just depends on you personality really