While you didn't provide any following sources, healthy sources of energy for humans are usually considered to be different types of fruits and vegetables, lean meats, wholewheat grains, nuts, seeds, and healthy oils. All these constitute a healthy human diet and are a healthy source of energy.
Answer: um i think 52 maybe sory if this answer was not helpful
Explanation:
These are some of the examples: new married people,small children,teenagers, pre-school years,retired adults,basically new things to life or like for beginners. Hope this helps.
