Answer the following question given this paragraph: 

Urine is a liquid waste formed by the kidneys as they filter the blood. If you are getting plenty of fluids, your urine should be almost clear. But you might have noticed that sometimes your urine is darker than usual. Do you know why this happens? Sometimes your body is low on water and trying to reduce the amount of water lost in urine. Therefore, your urine gets darker than usual. Your body is striving to maintain homeostasis through the process of excretion.


Q: What is the term for liquid waste formed by kidneys?

 Choices:

- blood

- feces

- sperm

- urine

A:
urine
