Answer:
C. Different organs working together to do a job
Explanation:
Pretty self explanatory, sets of organs make up an organ system.
Hopefully this helps!
Brainliest please?
If you are implying one these choices not needed for survival it would be parents only when you can survive on your own (I'm not that sure but I hope this helped the slightest but)
<span>temperature and pH yup yup</span>