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:
weak immune system
Explanation:
not getting enough sleep can slowly hurt the way your immune system fights off and protects germs
A - may include physical intimacy
B- involves people who are related by marriage or adoption
Check your other post I gave examples