Which is an advantage of using gymnosperms as decorative outdoor plants around homes and businesses? Most of them do not grow very tall.
Most of them stay green all year.
All of them produce colorful flowers,
All of them have sharp needle-like leaves.

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.