A is the correct answer
groups are the vertical columns on the table. if you look at it, you can see that the atomic number and atomic mass increases as you go down.
Answer: Its a type of "network." A water supply network or water supply system is a system of engineered hydrologic and hydraulic components that provide water supply.
Explanation:<em> S</em><em>chools, factories, office buildings, and hospitals which have their own water systems.</em><em> Transient Non-Community Water System (TNCWS): A public water system that provides water in a place such as a gas station or campground where people do not remain for long periods of time</em>
