Which of the following is the correctly balanced chemical equation for the reaction of Ca(OH)2 and HNO3?

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.

The state or quality of being humid.a quantity representing the amount of water vapor in the atmosphere or a gas.

We are not here to write essays for people. this is something that you decide and share your opinions on yourself. just do some brainstorming and if all else fails just make something up.