biosphere 2 was an attempt to have humans lived within a perfectly closed system, as a model for living on other planets. The first attempt failed because the system began losing CO2, which was chemically reacting with the exposed concrete walls. How would you go about designing a habitat that is a closed system? Explain how matter and energy would flow within the system

C: plants and animals

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.