Of the following :the water system in southwestern United States. challenges the region is facing with its water supply.

two to three ways that everyone can conserve water.

PLS HELP

True is ur answer : )

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts