You drop it barely above the ground
The answer is A, storing urine until it is eliminated.
The bladder stores urine, allowing urination to be infrequent and controlled. The bladder is lined by layers of muscle tissue that stretch to hold urine. The normal capacity of the bladder is 400-600 mL. During urination, the bladder muscles squeeze, and two sphincters (valves) open to allow urine to flow out.
The answer to your question is


Enzymes help break down carbohydrates, fats, and proteins.
I hope this helps!
B. tears , this is not a first line of defense