help eliminate body wastes. help blood circulate. aid in digestion. aid in respiration.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The skin, lungs, and kidneys work together to
Possibilities:
- help eliminate body wastes.
- help blood circulate.
- aid in digestion.
- aid in respiration.

help eliminate body wastes.