Everything, DNA is the biggest part and role of your body without DNA you wouldn't be alive today.
If the personal isn't organized and running behind schedule
Eating disorders can be prevented by not working out loosing weight so people dont bully you or wear makeup dont sit on the couch all day umm maybe eat a salad once in a while
Answer:
A system is a group of individual parts that work together to form a unified whole. ... The final product or service provided by a system. Feedback loop. A process of monitoring outputs to determine whether or not the system is working.