I think that this would be the excretory system.
The Digestive systems breaks down food into nutrients the body can use
The respiratory system brings in oxygen and removes carbon dioxide
The excretory system removes waste products from the body
The nervous system controls all other systems and processes information
2.2 moles of O2 will be produced by the decomposition of 4.4 moles of water.
Answer:
They are simple to build and/or design.
Explanation:
Hope this helps ??