What does it mean when some psychologists support the idea that people experience a series of independent steps or stages?

People want to be independent and they try to remain independent because it makes people feel like they have more control in their lives that is why it starts in stages of for example choosing your own clothes or outfit as a child and will eventually grow into moving out of your parent's house and living on your own. 

Hope this helps!

You should try to limit foods that are high in carbs and trans fats