Living cells use as their main source of energy.

Carbohydrate (glucose)

Explanation:

Living cells require a constant supply of energy to generate and maintain their life processes. This energy is derived from the chemical bond energy in food molecules, which thereby serve as fuel for cells. Glucose, a sugar and simple carbohydrate, dominates energy production in most cells. Glucose is slowly broken down (catabolism) in a series of steps including- Glycolysis, Kreb's cycle, oxidative phosphorylation, collectively called CELLULAR RESPIRATION to produce ATP.

i would spend it with those i love the most.i would do whatever to make up for those i have hurt intentionally or unintentionally.i would in all possible ways try to comfort the ones who love me nd of all i would gather courage nd say sry to my best friend

when it's short and dry.