Answer the following question given this paragraph: 

Each of the above organs of excretion is also part of another body system. For example, the large intestine and liver are part of the digestive system, and the lungs are part of the respiratory system. The kidneys are the main organs of excretion. They are part of the urinary system.


Q: What paired organs that are part of the urinary system play the prime role in excretion?

 Choices:

- ovaries

- liver

- lungs

- kidneys

A:
kidneys
