After the completion of the railroad, a major industry in the west was

Ranching

Explanation:

The majority of the West turned into ranching because of the geographical condition. The railroads helped people to move to the West to start a new life. The Great Plains helped people to open ranch. Ranching became possible because of cowboys who helped by herding cattle, horses and by repaired fences and buildings(stables etc.).

then its a law the end

hello! : )

i think a judge or jury, as they preside over the court and is the central figure in a trial.

hope this and i hope i answered in time!

good luck!

~ destiny ^_^