That's called evolution. I'm not sure exactly what it's asking, but I hope this helps you
Glucose is the 6 carbon sugar serves as the primary fuel for metabolism in all living things. According to Merriam dictionary, glucose is a type of sugar that is found in plants and fruits.It has a molecular formula of C₆H₁₂O₆. It also circulates in the blood of animals as blood sugar. It is made during photosynthesis from water and carbon dioxide, using energy from sunlight.
It releases bound oxygen into your body's tissues.
If they’re doing it to kill themselves, they die, man.