Gases can be produced by normal flora (bacteria that normally lives in the intestines) and harmful bacteria as well.
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
Self-actualization in Maslow's terms was when a human reaches their fullest potential regarding all of the needs provided on the pyramid. It represents their growth to this their highest, fullest potential.
Wait I’m confused, what’s the question?