Question

3
One of the methods, that can help in destroying harmful germs in water, is-
chlorination
addition of fertilisers
loading
filtering
by adding alum. This process is know​

Answer 1

$\pink{\huge{\underline{\underline{⠀⠀❥Answer⠀⠀❥}}}}$

Chlorination.

Answer 2

Chlorination. Chlorination has been the predominant method of drinking water disinfection in the United States for more than 70 years.