Which of the following statements about the water cycle is TRUE? Plants do not influence the water cycle
Precipitation that falls to the ground can end up as groundwater
The water cycle only continues during daylight hours
Once water flows into the ground, it is stuck there forever

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.