The answer to your question is B because it stores urine from your kidneys .
The substance that provides immediate energy is adenosine triphosphate (ATP). ATP is called the energy currency of the cell, and is hydrolyzed to produce adenosine diphosphate and a phosphate group.
ATP is obtained by break down of carbohydrates, fats as well as proteins.
B since life cant always be the same and the other 3 you can control and look after
