This sounds a lot like its hinting at the bodies proactiveness in preparing for evolution of any sort.
I would say c would be the best.
Like all animals the noises they make are to warn off predators, and mating call. IDk
Answer:
The urinary system consists of the ureters, kidneys, bladder, and urethra, also known as the renal system or urinary tract. It performs several functions including:
1. Regulate blood volume and pressure: change the amount of water lost in urine, EPO (more bone marrow activates RBC) and Renin
2. Regulate concentrations of plasma ions: monitors potassium, sodium, and chloride ions lost through urine and calcium ion levels by calcitriol synthesis (osteoclast activity and prevents urinary loss)
3. Helps to regulate blood pH: monitor hydrogen ion loss and bicarbonate ions in urine
4. Conserve essential nutrients: preventing nutrient excretion when excreting agricultural wastes
5. Help to detoxify toxins in the liver
