What kind of information does the nutrition facts label give about requirements for essential nutrients?

What kind of information does the Nutrition Facts label give about requirements for essential nutrients?
The nutrition facts label includes: "% Daily Value" based on a 2000 calorie diet * information about total fat, saturated fat, trans fat, cholesterol, fiber, and other nutrients.

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.