Answer:
I would say I, II, and III. All ways could describe a situation where drinking water is contaminated.
There are 3 Oxygen atoms bonded to 1 Nitrogen atom.
Hope this helps!
-Payshence
Dry climates do not have sufficient precipitation during the most of the year.
Desert are located in the arid climate.
The semiarid climate is in a grassland, or steppe, region.